#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_2__ TYPE_1__;

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

/* Variables and functions */
int /*<<< orphan*/ ITIMER_REAL;
int /*<<< orphan*/ setitimer(int /*<<< orphan*/, struct itimerval *,
                             int /*<<< orphan*/ *);
void alarmtimer(int wait) {
  struct itimerval itv;
  itv.it_value.tv_sec = wait;
  itv.it_value.tv_usec = 0;
  itv.it_interval = itv.it_value;
  setitimer(ITIMER_REAL, &itv, NULL);
}


x86 assembly (clang, -O0):
<alarmtimer>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%eax
mov    %eax,-0x28(%rbp)
movq   $0x0,-0x20(%rbp)
mov    -0x28(%rbp),%rax
mov    %rax,-0x18(%rbp)
mov    -0x20(%rbp),%rax
mov    %rax,-0x10(%rbp)
mov    0x2ea0(%rip),%rax
mov    (%rax),%edi
lea    -0x28(%rbp),%rsi
xor    %eax,%eax
mov    %eax,%edx
call   1030 <setitimer@plt>
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<alarmtimer>:
sub    $0x28,%rsp
mov    %edi,0x8(%rsp)
movq   $0x0,0x10(%rsp)
mov    0x8(%rsp),%eax
mov    %eax,0x18(%rsp)
mov    0xc(%rsp),%eax
mov    %eax,0x1c(%rsp)
mov    0x10(%rsp),%rax
mov    %rax,0x20(%rsp)
mov    0x2e9e(%rip),%rax
mov    (%rax),%edi
lea    0x8(%rsp),%rsi
xor    %edx,%edx
call   1030 <setitimer@plt>
add    $0x28,%rsp
ret

LLVM IR (-O0):
%struct.itimerval = type { %struct.TYPE_2__, %struct.TYPE_2__ }
%struct.TYPE_2__ = type { i32, i64 }
@ITIMER_REAL = global i32 0
define void @alarmtimer(i32 %0) {
%2 = alloca i32
%3 = alloca %struct.itimerval
store i32 %0, i32* %2
%4 = load i32, i32* %2
%5 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %3, i32 0, i32 0
%6 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %5, i32 0, i32 0
store i32 %4, i32* %6
%7 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %3, i32 0, i32 0
%8 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %7, i32 0, i32 1
store i64 0, i64* %8
%9 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %3, i32 0, i32 1
%10 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %3, i32 0, i32 0
%11 = bitcast %struct.TYPE_2__* %9 to i8*
%12 = bitcast %struct.TYPE_2__* %10 to i8*
%13 = load i32, i32* @ITIMER_REAL
%14 = call i32 @setitimer(i32 %13, %struct.itimerval* %3, i32* null)
ret void
}

LLVM IR (-O2):
%struct.itimerval = type { %struct.TYPE_2__, %struct.TYPE_2__ }
%struct.TYPE_2__ = type { i32, i64 }
@ITIMER_REAL = global i32 0
define void @alarmtimer(i32 %0) {
%2 = alloca %struct.itimerval
%3 = bitcast %struct.itimerval* %2 to i8*
%4 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %2, i64 0, i32 0, i32 0
store i32 %0, i32* %4
%5 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %2, i64 0, i32 0, i32 1
store i64 0, i64* %5
%6 = getelementptr inbounds %struct.itimerval, %struct.itimerval* %2, i64 0, i32 1
%7 = bitcast %struct.TYPE_2__* %6 to i8*
%8 = load i32, i32* @ITIMER_REAL
%9 = call i32 @setitimer(i32 %8, %struct.itimerval* %2, i32* null)
ret void
}