#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 */
double sqrt(double);
int norm(double v1[3], double norm[3]) {
  double mag;
  mag = sqrt(v1[0] * v1[0] + v1[1] * v1[1] + v1[2] * v1[2]);
  norm[0] = v1[0] / mag;
  norm[1] = v1[1] / mag;
  norm[2] = v1[2] / mag;
}


x86 assembly (clang, -O0):
<norm>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    -0x10(%rbp),%rax
movsd  (%rax),%xmm1
mov    -0x10(%rbp),%rax
movsd  (%rax),%xmm2
mov    -0x10(%rbp),%rax
movsd  0x8(%rax),%xmm0
mov    -0x10(%rbp),%rax
mulsd  0x8(%rax),%xmm0
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
mov    -0x10(%rbp),%rax
movsd  0x10(%rax),%xmm0
mov    -0x10(%rbp),%rax
movsd  0x10(%rax),%xmm2
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
call   1030 <sqrt@plt>
movsd  %xmm0,-0x20(%rbp)
mov    -0x10(%rbp),%rax
movsd  (%rax),%xmm0
divsd  -0x20(%rbp),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,(%rax)
mov    -0x10(%rbp),%rax
movsd  0x8(%rax),%xmm0
divsd  -0x20(%rbp),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x8(%rax)
mov    -0x10(%rbp),%rax
movsd  0x10(%rax),%xmm0
divsd  -0x20(%rbp),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x10(%rax)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<norm>:
push   %r14
push   %rbx
push   %rax
mov    %rsi,%r14
mov    %rdi,%rbx
movsd  (%rdi),%xmm1
movsd  0x8(%rdi),%xmm0
mulsd  %xmm0,%xmm0
mulsd  %xmm1,%xmm1
addsd  %xmm0,%xmm1
movsd  0x10(%rdi),%xmm0
mulsd  %xmm0,%xmm0
addsd  %xmm1,%xmm0
xorpd  %xmm1,%xmm1
ucomisd %xmm1,%xmm0
jb     114c <norm+0x3c>
sqrtsd %xmm0,%xmm0
jmp    1151 <norm+0x41>
call   1030 <sqrt@plt>
movsd  (%rbx),%xmm1
divsd  %xmm0,%xmm1
movsd  %xmm1,(%r14)
movsd  0x8(%rbx),%xmm1
divsd  %xmm0,%xmm1
movsd  %xmm1,0x8(%r14)
movsd  0x10(%rbx),%xmm1
divsd  %xmm0,%xmm1
movsd  %xmm1,0x10(%r14)
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
define i32 @norm(double* %0, double* %1) {
%3 = alloca i32
%4 = alloca double*
%5 = alloca double*
%6 = alloca double
store double* %0, double** %4
store double* %1, double** %5
%7 = load double*, double** %4
%8 = getelementptr inbounds double, double* %7, i64 0
%9 = load double, double* %8
%10 = load double*, double** %4
%11 = getelementptr inbounds double, double* %10, i64 0
%12 = load double, double* %11
%13 = load double*, double** %4
%14 = getelementptr inbounds double, double* %13, i64 1
%15 = load double, double* %14
%16 = load double*, double** %4
%17 = getelementptr inbounds double, double* %16, i64 1
%18 = load double, double* %17
%19 = fmul double %15, %18
%20 = call double @llvm.fmuladd.f64(double %9, double %12, double %19)
%21 = load double*, double** %4
%22 = getelementptr inbounds double, double* %21, i64 2
%23 = load double, double* %22
%24 = load double*, double** %4
%25 = getelementptr inbounds double, double* %24, i64 2
%26 = load double, double* %25
%27 = call double @llvm.fmuladd.f64(double %23, double %26, double %20)
%28 = call double @sqrt(double %27)
store double %28, double* %6
%29 = load double*, double** %4
%30 = getelementptr inbounds double, double* %29, i64 0
%31 = load double, double* %30
%32 = load double, double* %6
%33 = fdiv double %31, %32
%34 = load double*, double** %5
%35 = getelementptr inbounds double, double* %34, i64 0
store double %33, double* %35
%36 = load double*, double** %4
%37 = getelementptr inbounds double, double* %36, i64 1
%38 = load double, double* %37
%39 = load double, double* %6
%40 = fdiv double %38, %39
%41 = load double*, double** %5
%42 = getelementptr inbounds double, double* %41, i64 1
store double %40, double* %42
%43 = load double*, double** %4
%44 = getelementptr inbounds double, double* %43, i64 2
%45 = load double, double* %44
%46 = load double, double* %6
%47 = fdiv double %45, %46
%48 = load double*, double** %5
%49 = getelementptr inbounds double, double* %48, i64 2
store double %47, double* %49
%50 = load i32, i32* %3
ret i32 %50
}

LLVM IR (-O2):
define i32 @norm(double* nocapture %0, double* nocapture writeonly %1) {
%3 = load double, double* %0
%4 = getelementptr inbounds double, double* %0, i64 1
%5 = load double, double* %4
%6 = fmul double %5, %5
%7 = tail call double @llvm.fmuladd.f64(double %3, double %3, double %6)
%8 = getelementptr inbounds double, double* %0, i64 2
%9 = load double, double* %8
%10 = tail call double @llvm.fmuladd.f64(double %9, double %9, double %7)
%11 = tail call double @sqrt(double %10)
%12 = load double, double* %0
%13 = fdiv double %12, %11
store double %13, double* %1
%14 = load double, double* %4
%15 = fdiv double %14, %11
%16 = getelementptr inbounds double, double* %1, i64 1
store double %15, double* %16
%17 = load double, double* %8
%18 = fdiv double %17, %11
%19 = getelementptr inbounds double, double* %1, i64 2
store double %18, double* %19
ret i32 undef
}