#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 */
typedef struct TYPE_4__ TYPE_2__;
typedef struct TYPE_3__ TYPE_1__;

/* Type definitions */
struct TYPE_4__ {
  int tv_usec;
  scalar_t__ tv_sec;
};
struct TYPE_3__ {
  int tv_usec;
  scalar_t__ tv_sec;
};
struct itimerval {
  TYPE_2__ it_interval;
  TYPE_1__ it_value;
};

/* Variables and functions */
int /*<<< orphan*/ ITIMER_VIRTUAL;
int /*<<< orphan*/ setitimer(int /*<<< orphan*/, struct itimerval *,
                             int /*<<< orphan*/ *);
int main(void) {
  struct itimerval timer;
  timer.it_value.tv_sec = 0;
  timer.it_value.tv_usec = 250000;
  timer.it_interval.tv_sec = 0;
  timer.it_interval.tv_usec = 250000;
  setitimer(ITIMER_VIRTUAL, &timer, NULL);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
movq   $0x0,-0x10(%rbp)
movl   $0x3d090,-0x18(%rbp)
movq   $0x0,-0x20(%rbp)
movl   $0x3d090,-0x28(%rbp)
mov    0x2ea4(%rip),%rax
mov    (%rax),%edi
lea    -0x28(%rbp),%rsi
xor    %eax,%eax
mov    %eax,%edx
call   1030 <setitimer@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x28,%rsp
movq   $0x0,0x20(%rsp)
movl   $0x3d090,0x18(%rsp)
movq   $0x0,0x10(%rsp)
movl   $0x3d090,0x8(%rsp)
mov    0x2eab(%rip),%rax
mov    (%rax),%edi
lea    0x8(%rsp),%rsi
xor    %edx,%edx
call   1030 <setitimer@plt>
xor    %eax,%eax
add    $0x28,%rsp
ret

LLVM IR (-O0):
%struct.itimerval = type { %struct.TYPE_4__, %struct.TYPE_3__ }
%struct.TYPE_4__ = type { i32, i64 }
%struct.TYPE_3__ = type { i32, i64 }
@ITIMER_VIRTUAL = global i32 0
define i32 @main() {
%1 = alloca i32
%2 = alloca %struct.itimerval
store i32 0, i32* %1
%3 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %2, i32 0, i32 1
%4 = getelementptr inbounds %struct.TYPE_3__, %struct.TYPE_3__* %3, i32 0, i32 1
store i64 0, i64* %4
%5 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %2, i32 0, i32 1
%6 = getelementptr inbounds %struct.TYPE_3__, %struct.TYPE_3__* %5, i32 0, i32 0
store i32 250000, i32* %6
%7 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %2, i32 0, i32 0
%8 = getelementptr inbounds %struct.TYPE_4__, %struct.TYPE_4__* %7, i32 0, i32 1
store i64 0, i64* %8
%9 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %2, i32 0, i32 0
%10 = getelementptr inbounds %struct.TYPE_4__, %struct.TYPE_4__* %9, i32 0, i32 0
store i32 250000, i32* %10
%11 = load i32, i32* @ITIMER_VIRTUAL
%12 = call i32 @setitimer(i32 %11, %struct.itimerval* %2, i32* null)
ret i32 0
}

LLVM IR (-O2):
%struct.itimerval = type { %struct.TYPE_4__, %struct.TYPE_3__ }
%struct.TYPE_4__ = type { i32, i64 }
%struct.TYPE_3__ = type { i32, i64 }
@ITIMER_VIRTUAL = global i32 0
define i32 @main() {
%1 = alloca %struct.itimerval
%2 = bitcast %struct.itimerval* %1 to i8*
%3 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %1, i64 0, i32 1, i32 1
store i64 0, i64* %3
%4 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %1, i64 0, i32 1, i32 0
store i32 250000, i32* %4
%5 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %1, i64 0, i32 0, i32 1
store i64 0, i64* %5
%6 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %1, i64 0, i32 0, i32 0
store i32 250000, i32* %6
%7 = load i32, i32* @ITIMER_VIRTUAL
%8 = call i32 @setitimer(i32 %7, %struct.itimerval* %1, i32* null)
ret i32 0
}