#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
float sqrt(float);
void normalize(float *v, float factor) {
  float mag = sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]) / factor;
  v[0] /= mag;
  v[1] /= mag;
  v[2] /= mag;
}


x86 assembly (clang, -O0):
<normalize>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
movss  %xmm0,-0xc(%rbp)
mov    -0x8(%rbp),%rax
movss  (%rax),%xmm1
mov    -0x8(%rbp),%rax
movss  (%rax),%xmm2
mov    -0x8(%rbp),%rax
movss  0x4(%rax),%xmm0
mov    -0x8(%rbp),%rax
mulss  0x4(%rax),%xmm0
mulss  %xmm2,%xmm1
addss  %xmm0,%xmm1
mov    -0x8(%rbp),%rax
movss  0x8(%rax),%xmm0
mov    -0x8(%rbp),%rax
movss  0x8(%rax),%xmm2
mulss  %xmm2,%xmm0
addss  %xmm1,%xmm0
call   1030 <sqrt@plt>
divss  -0xc(%rbp),%xmm0
movss  %xmm0,-0x10(%rbp)
movss  -0x10(%rbp),%xmm1
mov    -0x8(%rbp),%rax
movss  (%rax),%xmm0
divss  %xmm1,%xmm0
movss  %xmm0,(%rax)
movss  -0x10(%rbp),%xmm1
mov    -0x8(%rbp),%rax
movss  0x4(%rax),%xmm0
divss  %xmm1,%xmm0
movss  %xmm0,0x4(%rax)
movss  -0x10(%rbp),%xmm1
mov    -0x8(%rbp),%rax
movss  0x8(%rax),%xmm0
divss  %xmm1,%xmm0
movss  %xmm0,0x8(%rax)
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<normalize>:
push   %rbx
sub    $0x10,%rsp
movaps %xmm0,%xmm2
mov    %rdi,%rbx
movss  (%rdi),%xmm1
movss  0x4(%rdi),%xmm0
mulss  %xmm0,%xmm0
mulss  %xmm1,%xmm1
addss  %xmm0,%xmm1
movss  0x8(%rdi),%xmm0
mulss  %xmm0,%xmm0
addss  %xmm1,%xmm0
xorps  %xmm1,%xmm1
ucomiss %xmm1,%xmm0
jb     114b <normalize+0x3b>
sqrtss %xmm0,%xmm0
jmp    115c <normalize+0x4c>
movss  %xmm2,0xc(%rsp)
call   1030 <sqrt@plt>
movss  0xc(%rsp),%xmm2
divss  %xmm2,%xmm0
movss  (%rbx),%xmm1
movss  0x4(%rbx),%xmm2
divss  %xmm0,%xmm1
movss  %xmm1,(%rbx)
divss  %xmm0,%xmm2
movss  %xmm2,0x4(%rbx)
movss  0x8(%rbx),%xmm1
divss  %xmm0,%xmm1
movss  %xmm1,0x8(%rbx)
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
define void @normalize(float* %0, float %1) {
%3 = alloca float*
%4 = alloca float
%5 = alloca float
store float* %0, float** %3
store float %1, float* %4
%6 = load float*, float** %3
%7 = getelementptr inbounds float, float* %6, i64 0
%8 = load float, float* %7
%9 = load float*, float** %3
%10 = getelementptr inbounds float, float* %9, i64 0
%11 = load float, float* %10
%12 = load float*, float** %3
%13 = getelementptr inbounds float, float* %12, i64 1
%14 = load float, float* %13
%15 = load float*, float** %3
%16 = getelementptr inbounds float, float* %15, i64 1
%17 = load float, float* %16
%18 = fmul float %14, %17
%19 = call float @llvm.fmuladd.f32(float %8, float %11, float %18)
%20 = load float*, float** %3
%21 = getelementptr inbounds float, float* %20, i64 2
%22 = load float, float* %21
%23 = load float*, float** %3
%24 = getelementptr inbounds float, float* %23, i64 2
%25 = load float, float* %24
%26 = call float @llvm.fmuladd.f32(float %22, float %25, float %19)
%27 = call float @sqrt(float %26)
%28 = load float, float* %4
%29 = fdiv float %27, %28
store float %29, float* %5
%30 = load float, float* %5
%31 = load float*, float** %3
%32 = getelementptr inbounds float, float* %31, i64 0
%33 = load float, float* %32
%34 = fdiv float %33, %30
store float %34, float* %32
%35 = load float, float* %5
%36 = load float*, float** %3
%37 = getelementptr inbounds float, float* %36, i64 1
%38 = load float, float* %37
%39 = fdiv float %38, %35
store float %39, float* %37
%40 = load float, float* %5
%41 = load float*, float** %3
%42 = getelementptr inbounds float, float* %41, i64 2
%43 = load float, float* %42
%44 = fdiv float %43, %40
store float %44, float* %42
ret void
}

LLVM IR (-O2):
define void @normalize(float* nocapture %0, float %1) {
%3 = load float, float* %0
%4 = getelementptr inbounds float, float* %0, i64 1
%5 = load float, float* %4
%6 = fmul float %5, %5
%7 = tail call float @llvm.fmuladd.f32(float %3, float %3, float %6)
%8 = getelementptr inbounds float, float* %0, i64 2
%9 = load float, float* %8
%10 = tail call float @llvm.fmuladd.f32(float %9, float %9, float %7)
%11 = tail call float @sqrt(float %10)
%12 = fdiv float %11, %1
%13 = load float, float* %0
%14 = fdiv float %13, %12
store float %14, float* %0
%15 = load float, float* %4
%16 = fdiv float %15, %12
store float %16, float* %4
%17 = load float, float* %8
%18 = fdiv float %17, %12
store float %18, float* %8
ret void
}