#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 timespec {
  int tv_sec;
  int tv_nsec;
};

/* Variables and functions */
int /*<<< orphan*/ CLOCK_REALTIME;
int clock_gettime(int /*<<< orphan*/, struct timespec *);
long long flu_getMs() {
  struct timespec ts;
  int r = clock_gettime(CLOCK_REALTIME, &ts);
  return r == 0 ? ts.tv_sec * 1000000 + ts.tv_nsec / 1000 : 0;
}


x86 assembly (clang, -O0):
<flu_getMs>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    0x2ec1(%rip),%rax
mov    (%rax),%edi
lea    -0x8(%rbp),%rsi
call   1030 <clock_gettime@plt>
mov    %eax,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
jne    115b <flu_getMs+0x4b>
imul   $0xf4240,-0x8(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x4(%rbp),%eax
mov    $0x3e8,%ecx
cltd
idiv   %ecx
mov    %eax,%ecx
mov    -0x14(%rbp),%eax
add    %ecx,%eax
mov    %eax,-0x10(%rbp)
jmp    1165 <flu_getMs+0x55>
xor    %eax,%eax
mov    %eax,-0x10(%rbp)
jmp    1165 <flu_getMs+0x55>
mov    -0x10(%rbp),%eax
cltq
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<flu_getMs>:
push   %rax
mov    0x2ec8(%rip),%rax
mov    (%rax),%edi
mov    %rsp,%rsi
call   1030 <clock_gettime@plt>
test   %eax,%eax
je     112a <flu_getMs+0x1a>
xor    %eax,%eax
pop    %rcx
ret
movslq (%rsp),%rax
imul   $0xf4240,%rax,%rcx
movslq 0x4(%rsp),%rax
imul   $0x10624dd3,%rax,%rax
mov    %rax,%rdx
shr    $0x3f,%rdx
sar    $0x26,%rax
add    %edx,%eax
cltq
add    %rcx,%rax
pop    %rcx
ret

LLVM IR (-O0):
%struct.timespec = type { i32, i32 }
@CLOCK_REALTIME = global i32 0
define i64 @flu_getMs() {
%1 = alloca %struct.timespec
%2 = alloca i32
%3 = load i32, i32* @CLOCK_REALTIME
%4 = call i32 @clock_gettime(i32 %3, %struct.timespec* %1)
store i32 %4, i32* %2
%5 = load i32, i32* %2
%6 = icmp eq i32 %5, 0
br i1 %6, label %7, label %15
7: ; preds = %0
%8 = getelementptr inbounds %struct.timespec, %struct.timespec* %1, i32 0, i32 0
%9 = load i32, i32* %8
%10 = mul nsw i32 %9, 1000000
%11 = getelementptr inbounds %struct.timespec, %struct.timespec* %1, i32 0, i32 1
%12 = load i32, i32* %11
%13 = sdiv i32 %12, 1000
%14 = add nsw i32 %10, %13
br label %16
15: ; preds = %0
br label %16
16: ; preds = %15, %7
%17 = phi i32 [ %14, %7 ], [ 0, %15 ]
%18 = sext i32 %17 to i64
ret i64 %18
}

LLVM IR (-O2):
%struct.timespec = type { i32, i32 }
@CLOCK_REALTIME = global i32 0
define i64 @flu_getMs() {
%1 = alloca %struct.timespec
%2 = bitcast %struct.timespec* %1 to i8*
%3 = load i32, i32* @CLOCK_REALTIME
%4 = call i32 @clock_gettime(i32 %3, %struct.timespec* %1)
%5 = icmp eq i32 %4, 0
br i1 %5, label %6, label %15
6: ; preds = %0
%7 = getelementptr inbounds %struct.timespec, %struct.timespec* %1, i64 0, i32 0
%8 = load i32, i32* %7
%9 = mul nsw i32 %8, 1000000
%10 = getelementptr inbounds %struct.timespec, %struct.timespec* %1, i64 0, i32 1
%11 = load i32, i32* %10
%12 = sdiv i32 %11, 1000
%13 = add nsw i32 %12, %9
%14 = sext i32 %13 to i64
br label %15
15: ; preds = %0, %6
%16 = phi i64 [ %14, %6 ], [ 0, %0 ]
ret i64 %16
}