#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 */
typedef int uint32_t;
struct timespec {
  int tv_sec;
  int tv_nsec;
};

/* Variables and functions */
int /*<<< orphan*/ CLOCK_MONOTONIC;
int /*<<< orphan*/ assert(int);
int clock_gettime(int /*<<< orphan*/, struct timespec *);
uint32_t esp_log_timestamp(void) {
  struct timespec current_time;
  int result = clock_gettime(CLOCK_MONOTONIC, &current_time);
  assert(result == 0);
  uint32_t milliseconds =
      current_time.tv_sec * 1000 + current_time.tv_nsec / 1000000;
  return milliseconds;
}


x86 assembly (clang, -O0):
<esp_log_timestamp>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    0x2eb9(%rip),%rax
mov    (%rax),%edi
lea    -0x8(%rbp),%rsi
call   1030 <clock_gettime@plt>
mov    %eax,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1040 <assert@plt>
imul   $0x3e8,-0x8(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x4(%rbp),%eax
mov    $0xf4240,%ecx
cltd
idiv   %ecx
mov    %eax,%ecx
mov    -0x14(%rbp),%eax
add    %ecx,%eax
mov    %eax,-0x10(%rbp)
mov    -0x10(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<esp_log_timestamp>:
push   %rax
mov    0x2ec0(%rip),%rax
mov    (%rax),%edi
mov    %rsp,%rsi
call   1030 <clock_gettime@plt>
xor    %edi,%edi
test   %eax,%eax
sete   %dil
call   1040 <assert@plt>
imul   $0x3e8,(%rsp),%ecx
movslq 0x4(%rsp),%rax
imul   $0x431bde83,%rax,%rax
mov    %rax,%rdx
shr    $0x3f,%rdx
sar    $0x32,%rax
add    %edx,%eax
add    %ecx,%eax
pop    %rcx
ret

LLVM IR (-O0):
%struct.timespec = type { i32, i32 }
@CLOCK_MONOTONIC = global i32 0
define i32 @esp_log_timestamp() {
%1 = alloca %struct.timespec
%2 = alloca i32
%3 = alloca i32
%4 = load i32, i32* @CLOCK_MONOTONIC
%5 = call i32 @clock_gettime(i32 %4, %struct.timespec* %1)
store i32 %5, i32* %2
%6 = load i32, i32* %2
%7 = icmp eq i32 %6, 0
%8 = zext i1 %7 to i32
%9 = call i32 @assert(i32 %8)
%10 = getelementptr inbounds %struct.timespec, %struct.timespec* %1, i32 0, i32 0
%11 = load i32, i32* %10
%12 = mul nsw i32 %11, 1000
%13 = getelementptr inbounds %struct.timespec, %struct.timespec* %1, i32 0, i32 1
%14 = load i32, i32* %13
%15 = sdiv i32 %14, 1000000
%16 = add nsw i32 %12, %15
store i32 %16, i32* %3
%17 = load i32, i32* %3
ret i32 %17
}

LLVM IR (-O2):
%struct.timespec = type { i32, i32 }
@CLOCK_MONOTONIC = global i32 0
define i32 @esp_log_timestamp() {
%1 = alloca %struct.timespec
%2 = bitcast %struct.timespec* %1 to i8*
%3 = load i32, i32* @CLOCK_MONOTONIC
%4 = call i32 @clock_gettime(i32 %3, %struct.timespec* %1)
%5 = icmp eq i32 %4, 0
%6 = zext i1 %5 to i32
%7 = call i32 @assert(i32 %6)
%8 = getelementptr inbounds %struct.timespec, %struct.timespec* %1, i64 0, i32 0
%9 = load i32, i32* %8
%10 = mul nsw i32 %9, 1000
%11 = getelementptr inbounds %struct.timespec, %struct.timespec* %1, i64 0, i32 1
%12 = load i32, i32* %11
%13 = sdiv i32 %12, 1000000
%14 = add nsw i32 %13, %10
ret i32 %14
}