#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);
int RBR_vector_unify(float *V) {
  int i;
  float magnitude;
  magnitude = sqrt(V[0] * V[0] + V[1] * V[1] + V[2] * V[2]);
  for (i = 0; i < 3; ++i)
    V[i] = ((1 / magnitude) * (float)V[i]);
  return 0;
}


x86 assembly (clang, -O0):
<RBR_vector_unify>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%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>
movss  %xmm0,-0x10(%rbp)
movl   $0x0,-0xc(%rbp)
cmpl   $0x3,-0xc(%rbp)
jge    11b0 <RBR_vector_unify+0xa0>
movss  0xe7d(%rip),%xmm0
divss  -0x10(%rbp),%xmm0
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
mulss  (%rax,%rcx,4),%xmm0
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movss  %xmm0,(%rax,%rcx,4)
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1171 <RBR_vector_unify+0x61>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<RBR_vector_unify>:
push   %rbx
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     1144 <RBR_vector_unify+0x34>
sqrtss %xmm0,%xmm0
jmp    1149 <RBR_vector_unify+0x39>
call   1030 <sqrt@plt>
movss  0xeaf(%rip),%xmm1
divss  %xmm0,%xmm1
movss  (%rbx),%xmm0
mulss  %xmm1,%xmm0
movss  %xmm0,(%rbx)
movss  0x4(%rbx),%xmm0
mulss  %xmm1,%xmm0
movss  %xmm0,0x4(%rbx)
mulss  0x8(%rbx),%xmm1
movss  %xmm1,0x8(%rbx)
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
define i32 @RBR_vector_unify(float* %0) {
%2 = alloca float*
%3 = alloca i32
%4 = alloca float
store float* %0, float** %2
%5 = load float*, float** %2
%6 = getelementptr inbounds float, float* %5, i64 0
%7 = load float, float* %6
%8 = load float*, float** %2
%9 = getelementptr inbounds float, float* %8, i64 0
%10 = load float, float* %9
%11 = load float*, float** %2
%12 = getelementptr inbounds float, float* %11, i64 1
%13 = load float, float* %12
%14 = load float*, float** %2
%15 = getelementptr inbounds float, float* %14, i64 1
%16 = load float, float* %15
%17 = fmul float %13, %16
%18 = call float @llvm.fmuladd.f32(float %7, float %10, float %17)
%19 = load float*, float** %2
%20 = getelementptr inbounds float, float* %19, i64 2
%21 = load float, float* %20
%22 = load float*, float** %2
%23 = getelementptr inbounds float, float* %22, i64 2
%24 = load float, float* %23
%25 = call float @llvm.fmuladd.f32(float %21, float %24, float %18)
%26 = call float @sqrt(float %25)
store float %26, float* %4
store i32 0, i32* %3
br label %27
27: ; preds = %43, %1
%28 = load i32, i32* %3
%29 = icmp slt i32 %28, 3
br i1 %29, label %30, label %46
30: ; preds = %27
%31 = load float, float* %4
%32 = fdiv float 1.000000e+00, %31
%33 = load float*, float** %2
%34 = load i32, i32* %3
%35 = sext i32 %34 to i64
%36 = getelementptr inbounds float, float* %33, i64 %35
%37 = load float, float* %36
%38 = fmul float %32, %37
%39 = load float*, float** %2
%40 = load i32, i32* %3
%41 = sext i32 %40 to i64
%42 = getelementptr inbounds float, float* %39, i64 %41
store float %38, float* %42
br label %43
43: ; preds = %30
%44 = load i32, i32* %3
%45 = add nsw i32 %44, 1
store i32 %45, i32* %3
br label %27
46: ; preds = %27
ret i32 0
}

LLVM IR (-O2):
define i32 @RBR_vector_unify(float* nocapture %0) {
%2 = load float, float* %0
%3 = getelementptr inbounds float, float* %0, i64 1
%4 = load float, float* %3
%5 = fmul float %4, %4
%6 = tail call float @llvm.fmuladd.f32(float %2, float %2, float %5)
%7 = getelementptr inbounds float, float* %0, i64 2
%8 = load float, float* %7
%9 = tail call float @llvm.fmuladd.f32(float %8, float %8, float %6)
%10 = tail call float @sqrt(float %9)
%11 = fdiv float 1.000000e+00, %10
%12 = load float, float* %0
%13 = fmul float %11, %12
store float %13, float* %0
%14 = load float, float* %3
%15 = fmul float %11, %14
store float %15, float* %3
%16 = load float, float* %7
%17 = fmul float %11, %16
store float %17, float* %7
ret i32 0
}