void copy44f(float *src, float *dst) {
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
  *(dst++) = *(src++);
}


x86 assembly (clang, -O0):
<copy44f>:
push   %rbp
mov    %rsp,%rbp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x8(%rbp)
movss  (%rax),%xmm0
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x4,%rcx
mov    %rcx,-0x10(%rbp)
movss  %xmm0,(%rax)
pop    %rbp
ret

x86 assembly (clang, -O2):
<copy44f>:
movss  (%rdi),%xmm0
movss  %xmm0,(%rsi)
movss  0x4(%rdi),%xmm0
movss  %xmm0,0x4(%rsi)
movss  0x8(%rdi),%xmm0
movss  %xmm0,0x8(%rsi)
movss  0xc(%rdi),%xmm0
movss  %xmm0,0xc(%rsi)
movss  0x10(%rdi),%xmm0
movss  %xmm0,0x10(%rsi)
movss  0x14(%rdi),%xmm0
movss  %xmm0,0x14(%rsi)
movss  0x18(%rdi),%xmm0
movss  %xmm0,0x18(%rsi)
movss  0x1c(%rdi),%xmm0
movss  %xmm0,0x1c(%rsi)
movss  0x20(%rdi),%xmm0
movss  %xmm0,0x20(%rsi)
movss  0x24(%rdi),%xmm0
movss  %xmm0,0x24(%rsi)
movss  0x28(%rdi),%xmm0
movss  %xmm0,0x28(%rsi)
movss  0x2c(%rdi),%xmm0
movss  %xmm0,0x2c(%rsi)
movss  0x30(%rdi),%xmm0
movss  %xmm0,0x30(%rsi)
movss  0x34(%rdi),%xmm0
movss  %xmm0,0x34(%rsi)
movss  0x38(%rdi),%xmm0
movss  %xmm0,0x38(%rsi)
movss  0x3c(%rdi),%xmm0
movss  %xmm0,0x3c(%rsi)
ret

LLVM IR (-O0):
define void @copy44f(float* %0, float* %1) {
%3 = alloca float*
%4 = alloca float*
store float* %0, float** %3
store float* %1, float** %4
%5 = load float*, float** %3
%6 = getelementptr inbounds float, float* %5, i32 1
store float* %6, float** %3
%7 = load float, float* %5
%8 = load float*, float** %4
%9 = getelementptr inbounds float, float* %8, i32 1
store float* %9, float** %4
store float %7, float* %8
%10 = load float*, float** %3
%11 = getelementptr inbounds float, float* %10, i32 1
store float* %11, float** %3
%12 = load float, float* %10
%13 = load float*, float** %4
%14 = getelementptr inbounds float, float* %13, i32 1
store float* %14, float** %4
store float %12, float* %13
%15 = load float*, float** %3
%16 = getelementptr inbounds float, float* %15, i32 1
store float* %16, float** %3
%17 = load float, float* %15
%18 = load float*, float** %4
%19 = getelementptr inbounds float, float* %18, i32 1
store float* %19, float** %4
store float %17, float* %18
%20 = load float*, float** %3
%21 = getelementptr inbounds float, float* %20, i32 1
store float* %21, float** %3
%22 = load float, float* %20
%23 = load float*, float** %4
%24 = getelementptr inbounds float, float* %23, i32 1
store float* %24, float** %4
store float %22, float* %23
%25 = load float*, float** %3
%26 = getelementptr inbounds float, float* %25, i32 1
store float* %26, float** %3
%27 = load float, float* %25
%28 = load float*, float** %4
%29 = getelementptr inbounds float, float* %28, i32 1
store float* %29, float** %4
store float %27, float* %28
%30 = load float*, float** %3
%31 = getelementptr inbounds float, float* %30, i32 1
store float* %31, float** %3
%32 = load float, float* %30
%33 = load float*, float** %4
%34 = getelementptr inbounds float, float* %33, i32 1
store float* %34, float** %4
store float %32, float* %33
%35 = load float*, float** %3
%36 = getelementptr inbounds float, float* %35, i32 1
store float* %36, float** %3
%37 = load float, float* %35
%38 = load float*, float** %4
%39 = getelementptr inbounds float, float* %38, i32 1
store float* %39, float** %4
store float %37, float* %38
%40 = load float*, float** %3
%41 = getelementptr inbounds float, float* %40, i32 1
store float* %41, float** %3
%42 = load float, float* %40
%43 = load float*, float** %4
%44 = getelementptr inbounds float, float* %43, i32 1
store float* %44, float** %4
store float %42, float* %43
%45 = load float*, float** %3
%46 = getelementptr inbounds float, float* %45, i32 1
store float* %46, float** %3
%47 = load float, float* %45
%48 = load float*, float** %4
%49 = getelementptr inbounds float, float* %48, i32 1
store float* %49, float** %4
store float %47, float* %48
%50 = load float*, float** %3
%51 = getelementptr inbounds float, float* %50, i32 1
store float* %51, float** %3
%52 = load float, float* %50
%53 = load float*, float** %4
%54 = getelementptr inbounds float, float* %53, i32 1
store float* %54, float** %4
store float %52, float* %53
%55 = load float*, float** %3
%56 = getelementptr inbounds float, float* %55, i32 1
store float* %56, float** %3
%57 = load float, float* %55
%58 = load float*, float** %4
%59 = getelementptr inbounds float, float* %58, i32 1
store float* %59, float** %4
store float %57, float* %58
%60 = load float*, float** %3
%61 = getelementptr inbounds float, float* %60, i32 1
store float* %61, float** %3
%62 = load float, float* %60
%63 = load float*, float** %4
%64 = getelementptr inbounds float, float* %63, i32 1
store float* %64, float** %4
store float %62, float* %63
%65 = load float*, float** %3
%66 = getelementptr inbounds float, float* %65, i32 1
store float* %66, float** %3
%67 = load float, float* %65
%68 = load float*, float** %4
%69 = getelementptr inbounds float, float* %68, i32 1
store float* %69, float** %4
store float %67, float* %68
%70 = load float*, float** %3
%71 = getelementptr inbounds float, float* %70, i32 1
store float* %71, float** %3
%72 = load float, float* %70
%73 = load float*, float** %4
%74 = getelementptr inbounds float, float* %73, i32 1
store float* %74, float** %4
store float %72, float* %73
%75 = load float*, float** %3
%76 = getelementptr inbounds float, float* %75, i32 1
store float* %76, float** %3
%77 = load float, float* %75
%78 = load float*, float** %4
%79 = getelementptr inbounds float, float* %78, i32 1
store float* %79, float** %4
store float %77, float* %78
%80 = load float*, float** %3
%81 = getelementptr inbounds float, float* %80, i32 1
store float* %81, float** %3
%82 = load float, float* %80
%83 = load float*, float** %4
%84 = getelementptr inbounds float, float* %83, i32 1
store float* %84, float** %4
store float %82, float* %83
ret void
}

LLVM IR (-O2):
define void @copy44f(float* nocapture %0, float* nocapture writeonly %1) {
%3 = getelementptr inbounds float, float* %0, i64 1
%4 = load float, float* %0
%5 = getelementptr inbounds float, float* %1, i64 1
store float %4, float* %1
%6 = getelementptr inbounds float, float* %0, i64 2
%7 = load float, float* %3
%8 = getelementptr inbounds float, float* %1, i64 2
store float %7, float* %5
%9 = getelementptr inbounds float, float* %0, i64 3
%10 = load float, float* %6
%11 = getelementptr inbounds float, float* %1, i64 3
store float %10, float* %8
%12 = getelementptr inbounds float, float* %0, i64 4
%13 = load float, float* %9
%14 = getelementptr inbounds float, float* %1, i64 4
store float %13, float* %11
%15 = getelementptr inbounds float, float* %0, i64 5
%16 = load float, float* %12
%17 = getelementptr inbounds float, float* %1, i64 5
store float %16, float* %14
%18 = getelementptr inbounds float, float* %0, i64 6
%19 = load float, float* %15
%20 = getelementptr inbounds float, float* %1, i64 6
store float %19, float* %17
%21 = getelementptr inbounds float, float* %0, i64 7
%22 = load float, float* %18
%23 = getelementptr inbounds float, float* %1, i64 7
store float %22, float* %20
%24 = getelementptr inbounds float, float* %0, i64 8
%25 = load float, float* %21
%26 = getelementptr inbounds float, float* %1, i64 8
store float %25, float* %23
%27 = getelementptr inbounds float, float* %0, i64 9
%28 = load float, float* %24
%29 = getelementptr inbounds float, float* %1, i64 9
store float %28, float* %26
%30 = getelementptr inbounds float, float* %0, i64 10
%31 = load float, float* %27
%32 = getelementptr inbounds float, float* %1, i64 10
store float %31, float* %29
%33 = getelementptr inbounds float, float* %0, i64 11
%34 = load float, float* %30
%35 = getelementptr inbounds float, float* %1, i64 11
store float %34, float* %32
%36 = getelementptr inbounds float, float* %0, i64 12
%37 = load float, float* %33
%38 = getelementptr inbounds float, float* %1, i64 12
store float %37, float* %35
%39 = getelementptr inbounds float, float* %0, i64 13
%40 = load float, float* %36
%41 = getelementptr inbounds float, float* %1, i64 13
store float %40, float* %38
%42 = getelementptr inbounds float, float* %0, i64 14
%43 = load float, float* %39
%44 = getelementptr inbounds float, float* %1, i64 14
store float %43, float* %41
%45 = getelementptr inbounds float, float* %0, i64 15
%46 = load float, float* %42
%47 = getelementptr inbounds float, float* %1, i64 15
store float %46, float* %44
%48 = load float, float* %45
store float %48, float* %47
ret void
}