#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 */
struct timeval {
  double tv_sec;
  scalar_t__ tv_usec;
};

/* Variables and functions */
long DBtimevaldiff(struct timeval *startTime, struct timeval *finishTime) {
  long msec;
  msec = (finishTime->tv_sec - startTime->tv_sec) * 1000000.0;
  msec += (finishTime->tv_usec - startTime->tv_usec);
  return msec;
}


x86 assembly (clang, -O0):
<DBtimevaldiff>:
push   %rbp
mov    %rsp,%rbp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x10(%rbp),%rax
movsd  (%rax),%xmm0
mov    -0x8(%rbp),%rax
subsd  (%rax),%xmm0
movsd  0xedc(%rip),%xmm1
mulsd  %xmm1,%xmm0
cvttsd2si %xmm0,%rax
mov    %rax,-0x18(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rax
mov    -0x8(%rbp),%rcx
sub    0x8(%rcx),%rax
add    -0x18(%rbp),%rax
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<DBtimevaldiff>:
movsd  (%rsi),%xmm0
subsd  (%rdi),%xmm0
mulsd  0xef0(%rip),%xmm0
cvttsd2si %xmm0,%rcx
mov    0x8(%rsi),%rax
sub    0x8(%rdi),%rax
add    %rcx,%rax
ret

LLVM IR (-O0):
%struct.timeval = type { double, i64 }
define i64 @DBtimevaldiff(%struct.timeval* %0, %struct.timeval* %1) {
%3 = alloca %struct.timeval*
%4 = alloca %struct.timeval*
%5 = alloca i64
store %struct.timeval* %0, %struct.timeval** %3
store %struct.timeval* %1, %struct.timeval** %4
%6 = load %struct.timeval*, %struct.timeval** %4
%7 = getelementptr inbounds %struct.timeval, %struct.timeval* %6, i32 0, i32 0
%8 = load double, double* %7
%9 = load %struct.timeval*, %struct.timeval** %3
%10 = getelementptr inbounds %struct.timeval, %struct.timeval* %9, i32 0, i32 0
%11 = load double, double* %10
%12 = fsub double %8, %11
%13 = fmul double %12, 1.000000e+06
%14 = fptosi double %13 to i64
store i64 %14, i64* %5
%15 = load %struct.timeval*, %struct.timeval** %4
%16 = getelementptr inbounds %struct.timeval, %struct.timeval* %15, i32 0, i32 1
%17 = load i64, i64* %16
%18 = load %struct.timeval*, %struct.timeval** %3
%19 = getelementptr inbounds %struct.timeval, %struct.timeval* %18, i32 0, i32 1
%20 = load i64, i64* %19
%21 = sub nsw i64 %17, %20
%22 = load i64, i64* %5
%23 = add nsw i64 %22, %21
store i64 %23, i64* %5
%24 = load i64, i64* %5
ret i64 %24
}

LLVM IR (-O2):
%struct.timeval = type { double, i64 }
define i64 @DBtimevaldiff(%struct.timeval* nocapture %0, %struct.timeval* nocapture %1) {
%3 = getelementptr inbounds %struct.timeval, %struct.timeval* %1, i64 0, i32 0
%4 = load double, double* %3
%5 = getelementptr inbounds %struct.timeval, %struct.timeval* %0, i64 0, i32 0
%6 = load double, double* %5
%7 = fsub double %4, %6
%8 = fmul double %7, 1.000000e+06
%9 = fptosi double %8 to i64
%10 = getelementptr inbounds %struct.timeval, %struct.timeval* %1, i64 0, i32 1
%11 = load i64, i64* %10
%12 = getelementptr inbounds %struct.timeval, %struct.timeval* %0, i64 0, i32 1
%13 = load i64, i64* %12
%14 = sub i64 %11, %13
%15 = add nsw i64 %14, %9
ret i64 %15
}