#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);
double calc_bond_length(double bond1x, double bond1y, double bond1z,
                        double bond2x, double bond2y, double bond2z) {
  return (sqrt((bond1x - bond2x) * (bond1x - bond2x) +
               (bond1y - bond2y) * (bond1y - bond2y) +
               (bond1z - bond2z) * (bond1z - bond2z)));
}


x86 assembly (clang, -O0):
<calc_bond_length>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movsd  %xmm0,-0x8(%rbp)
movsd  %xmm1,-0x10(%rbp)
movsd  %xmm2,-0x18(%rbp)
movsd  %xmm3,-0x20(%rbp)
movsd  %xmm4,-0x28(%rbp)
movsd  %xmm5,-0x30(%rbp)
movsd  -0x8(%rbp),%xmm1
subsd  -0x20(%rbp),%xmm1
movsd  -0x8(%rbp),%xmm2
subsd  -0x20(%rbp),%xmm2
movsd  -0x10(%rbp),%xmm0
subsd  -0x28(%rbp),%xmm0
movsd  -0x10(%rbp),%xmm3
subsd  -0x28(%rbp),%xmm3
mulsd  %xmm3,%xmm0
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
movsd  -0x18(%rbp),%xmm0
subsd  -0x30(%rbp),%xmm0
movsd  -0x18(%rbp),%xmm2
subsd  -0x30(%rbp),%xmm2
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
call   1030 <sqrt@plt>
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<calc_bond_length>:
subsd  %xmm3,%xmm0
subsd  %xmm4,%xmm1
mulsd  %xmm1,%xmm1
mulsd  %xmm0,%xmm0
addsd  %xmm1,%xmm0
subsd  %xmm5,%xmm2
mulsd  %xmm2,%xmm2
addsd  %xmm0,%xmm2
xorpd  %xmm0,%xmm0
ucomisd %xmm0,%xmm2
jb     1142 <calc_bond_length+0x32>
xorps  %xmm0,%xmm0
sqrtsd %xmm2,%xmm0
ret
movapd %xmm2,%xmm0
jmp    1030 <sqrt@plt>

LLVM IR (-O0):
define double @calc_bond_length(double %0, double %1, double %2, double %3, double %4, double %5) {
%7 = alloca double
%8 = alloca double
%9 = alloca double
%10 = alloca double
%11 = alloca double
%12 = alloca double
store double %0, double* %7
store double %1, double* %8
store double %2, double* %9
store double %3, double* %10
store double %4, double* %11
store double %5, double* %12
%13 = load double, double* %7
%14 = load double, double* %10
%15 = fsub double %13, %14
%16 = load double, double* %7
%17 = load double, double* %10
%18 = fsub double %16, %17
%19 = load double, double* %8
%20 = load double, double* %11
%21 = fsub double %19, %20
%22 = load double, double* %8
%23 = load double, double* %11
%24 = fsub double %22, %23
%25 = fmul double %21, %24
%26 = call double @llvm.fmuladd.f64(double %15, double %18, double %25)
%27 = load double, double* %9
%28 = load double, double* %12
%29 = fsub double %27, %28
%30 = load double, double* %9
%31 = load double, double* %12
%32 = fsub double %30, %31
%33 = call double @llvm.fmuladd.f64(double %29, double %32, double %26)
%34 = call double @sqrt(double %33)
ret double %34
}

LLVM IR (-O2):
define double @calc_bond_length(double %0, double %1, double %2, double %3, double %4, double %5) {
%7 = fsub double %0, %3
%8 = fsub double %1, %4
%9 = fmul double %8, %8
%10 = tail call double @llvm.fmuladd.f64(double %7, double %7, double %9)
%11 = fsub double %2, %5
%12 = tail call double @llvm.fmuladd.f64(double %11, double %11, double %10)
%13 = tail call double @sqrt(double %12)
ret double %13
}