#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 get_dp(double const, double const);
double get_dV(const double *xp, const double *xm) {
  double dx = xp[0] - xm[0];
  double dy = get_dp(xp[1], xm[1]);
  double dz = xp[2] - xm[2];
  return dx * dy * dz;
}


x86 assembly (clang, -O0):
<get_dV>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rax
movsd  (%rax),%xmm0
mov    -0x10(%rbp),%rax
subsd  (%rax),%xmm0
movsd  %xmm0,-0x18(%rbp)
mov    -0x8(%rbp),%rax
movsd  0x8(%rax),%xmm0
mov    -0x10(%rbp),%rax
movsd  0x8(%rax),%xmm1
call   1030 <get_dp@plt>
movsd  %xmm0,-0x20(%rbp)
mov    -0x8(%rbp),%rax
movsd  0x10(%rax),%xmm0
mov    -0x10(%rbp),%rax
subsd  0x10(%rax),%xmm0
movsd  %xmm0,-0x28(%rbp)
movsd  -0x18(%rbp),%xmm0
mulsd  -0x20(%rbp),%xmm0
mulsd  -0x28(%rbp),%xmm0
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_dV>:
push   %r14
push   %rbx
push   %rax
mov    %rsi,%r14
mov    %rdi,%rbx
movsd  (%rdi),%xmm1
movsd  0x8(%rdi),%xmm0
subsd  (%rsi),%xmm1
movsd  %xmm1,(%rsp)
movsd  0x8(%rsi),%xmm1
call   1030 <get_dp@plt>
movsd  0x10(%rbx),%xmm1
subsd  0x10(%r14),%xmm1
mulsd  (%rsp),%xmm0
mulsd  %xmm1,%xmm0
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
define double @get_dV(double* %0, double* %1) {
%3 = alloca double*
%4 = alloca double*
%5 = alloca double
%6 = alloca double
%7 = alloca double
store double* %0, double** %3
store double* %1, double** %4
%8 = load double*, double** %3
%9 = getelementptr inbounds double, double* %8, i64 0
%10 = load double, double* %9
%11 = load double*, double** %4
%12 = getelementptr inbounds double, double* %11, i64 0
%13 = load double, double* %12
%14 = fsub double %10, %13
store double %14, double* %5
%15 = load double*, double** %3
%16 = getelementptr inbounds double, double* %15, i64 1
%17 = load double, double* %16
%18 = load double*, double** %4
%19 = getelementptr inbounds double, double* %18, i64 1
%20 = load double, double* %19
%21 = call double @get_dp(double %17, double %20)
store double %21, double* %6
%22 = load double*, double** %3
%23 = getelementptr inbounds double, double* %22, i64 2
%24 = load double, double* %23
%25 = load double*, double** %4
%26 = getelementptr inbounds double, double* %25, i64 2
%27 = load double, double* %26
%28 = fsub double %24, %27
store double %28, double* %7
%29 = load double, double* %5
%30 = load double, double* %6
%31 = fmul double %29, %30
%32 = load double, double* %7
%33 = fmul double %31, %32
ret double %33
}

LLVM IR (-O2):
define double @get_dV(double* nocapture %0, double* nocapture %1) {
%3 = load double, double* %0
%4 = load double, double* %1
%5 = fsub double %3, %4
%6 = getelementptr inbounds double, double* %0, i64 1
%7 = load double, double* %6
%8 = getelementptr inbounds double, double* %1, i64 1
%9 = load double, double* %8
%10 = tail call double @get_dp(double %7, double %9)
%11 = getelementptr inbounds double, double* %0, i64 2
%12 = load double, double* %11
%13 = getelementptr inbounds double, double* %1, i64 2
%14 = load double, double* %13
%15 = fsub double %12, %14
%16 = fmul double %5, %10
%17 = fmul double %16, %15
ret double %17
}