#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 */
scalar_t__ sqrtf(float);
void v_nrm(float *n, const float *v) {
  float d = ((float)sqrtf(
      (float)((v)[0] * (v)[0] + (v)[1] * (v)[1] + (v)[2] * (v)[2])));
  n[0] = v[0] / d;
  n[1] = v[1] / d;
  n[2] = v[2] / d;
}


x86 assembly (clang, -O0):
<v_nrm>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x10(%rbp),%rax
movss  (%rax),%xmm1
mov    -0x10(%rbp),%rax
movss  (%rax),%xmm2
mov    -0x10(%rbp),%rax
movss  0x4(%rax),%xmm0
mov    -0x10(%rbp),%rax
mulss  0x4(%rax),%xmm0
mulss  %xmm2,%xmm1
addss  %xmm0,%xmm1
mov    -0x10(%rbp),%rax
movss  0x8(%rax),%xmm0
mov    -0x10(%rbp),%rax
movss  0x8(%rax),%xmm2
mulss  %xmm2,%xmm0
addss  %xmm1,%xmm0
call   1030 <sqrtf@plt>
cvtsi2ss %rax,%xmm0
movss  %xmm0,-0x14(%rbp)
mov    -0x10(%rbp),%rax
movss  (%rax),%xmm0
divss  -0x14(%rbp),%xmm0
mov    -0x8(%rbp),%rax
movss  %xmm0,(%rax)
mov    -0x10(%rbp),%rax
movss  0x4(%rax),%xmm0
divss  -0x14(%rbp),%xmm0
mov    -0x8(%rbp),%rax
movss  %xmm0,0x4(%rax)
mov    -0x10(%rbp),%rax
movss  0x8(%rax),%xmm0
divss  -0x14(%rbp),%xmm0
mov    -0x8(%rbp),%rax
movss  %xmm0,0x8(%rax)
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<v_nrm>:
push   %r14
push   %rbx
push   %rax
mov    %rsi,%rbx
mov    %rdi,%r14
movss  (%rsi),%xmm1
movss  0x4(%rsi),%xmm0
mulss  %xmm0,%xmm0
mulss  %xmm1,%xmm1
addss  %xmm0,%xmm1
movss  0x8(%rsi),%xmm0
mulss  %xmm0,%xmm0
addss  %xmm1,%xmm0
call   1030 <sqrtf@plt>
xorps  %xmm0,%xmm0
cvtsi2ss %rax,%xmm0
movss  (%rbx),%xmm1
divss  %xmm0,%xmm1
movss  %xmm1,(%r14)
movss  0x4(%rbx),%xmm1
divss  %xmm0,%xmm1
movss  %xmm1,0x4(%r14)
movss  0x8(%rbx),%xmm1
divss  %xmm0,%xmm1
movss  %xmm1,0x8(%r14)
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
define void @v_nrm(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** %4
%7 = getelementptr inbounds float, float* %6, i64 0
%8 = load float, float* %7
%9 = load float*, float** %4
%10 = getelementptr inbounds float, float* %9, i64 0
%11 = load float, float* %10
%12 = load float*, float** %4
%13 = getelementptr inbounds float, float* %12, i64 1
%14 = load float, float* %13
%15 = load float*, float** %4
%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** %4
%21 = getelementptr inbounds float, float* %20, i64 2
%22 = load float, float* %21
%23 = load float*, float** %4
%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 i64 @sqrtf(float %26)
%28 = sitofp i64 %27 to float
store float %28, float* %5
%29 = load float*, float** %4
%30 = getelementptr inbounds float, float* %29, i64 0
%31 = load float, float* %30
%32 = load float, float* %5
%33 = fdiv float %31, %32
%34 = load float*, float** %3
%35 = getelementptr inbounds float, float* %34, i64 0
store float %33, float* %35
%36 = load float*, float** %4
%37 = getelementptr inbounds float, float* %36, i64 1
%38 = load float, float* %37
%39 = load float, float* %5
%40 = fdiv float %38, %39
%41 = load float*, float** %3
%42 = getelementptr inbounds float, float* %41, i64 1
store float %40, float* %42
%43 = load float*, float** %4
%44 = getelementptr inbounds float, float* %43, i64 2
%45 = load float, float* %44
%46 = load float, float* %5
%47 = fdiv float %45, %46
%48 = load float*, float** %3
%49 = getelementptr inbounds float, float* %48, i64 2
store float %47, float* %49
ret void
}

LLVM IR (-O2):
define void @v_nrm(float* nocapture writeonly %0, float* nocapture %1) {
%3 = load float, float* %1
%4 = getelementptr inbounds float, float* %1, 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* %1, i64 2
%9 = load float, float* %8
%10 = tail call float @llvm.fmuladd.f32(float %9, float %9, float %7)
%11 = tail call i64 @sqrtf(float %10)
%12 = sitofp i64 %11 to float
%13 = load float, float* %1
%14 = fdiv float %13, %12
store float %14, float* %0
%15 = load float, float* %4
%16 = fdiv float %15, %12
%17 = getelementptr inbounds float, float* %0, i64 1
store float %16, float* %17
%18 = load float, float* %8
%19 = fdiv float %18, %12
%20 = getelementptr inbounds float, float* %0, i64 2
store float %19, float* %20
ret void
}