#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 input_event {
  int type;
  int code;
  int value;
};
typedef int /*<<< orphan*/ ev;

/* Variables and functions */
int /*<<< orphan*/ EXIT_FAILURE;
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ perror(char *);
scalar_t__ write(int, struct input_event *, int);
void send_event(int device, int type, int code, int value) {
  struct input_event ev;
  ev.type = type;
  ev.code = code;
  ev.value = value;
  if (write(device, &ev, sizeof(ev)) < 0) {
    perror("error: write()");
    exit(EXIT_FAILURE);
  };
}


x86 assembly (clang, -O0):
<send_event>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    %esi,-0x8(%rbp)
mov    %edx,-0xc(%rbp)
mov    %ecx,-0x10(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,-0x20(%rbp)
mov    -0xc(%rbp),%eax
mov    %eax,-0x1c(%rbp)
mov    -0x10(%rbp),%eax
mov    %eax,-0x18(%rbp)
mov    -0x4(%rbp),%edi
lea    -0x20(%rbp),%rsi
mov    $0xc,%edx
call   1030 <write@plt>
cmp    $0x0,%rax
jge    118b <send_event+0x5b>
lea    0xe88(%rip),%rdi
call   1040 <perror@plt>
mov    0x2e5c(%rip),%rax
mov    (%rax),%edi
call   1050 <exit@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<send_event>:
sub    $0x18,%rsp
mov    %esi,0x8(%rsp)
mov    %edx,0xc(%rsp)
mov    %ecx,0x10(%rsp)
lea    0x8(%rsp),%rsi
mov    $0xc,%edx
call   1030 <write@plt>
test   %rax,%rax
js     1159 <send_event+0x29>
add    $0x18,%rsp
ret
lea    0xea0(%rip),%rdi
call   1040 <perror@plt>
mov    0x2e74(%rip),%rax
mov    (%rax),%edi
call   1050 <exit@plt>

LLVM IR (-O0):
%struct.input_event = type { i32, i32, i32 }
@.str = [15 x i8] c"error: write()\00"
@EXIT_FAILURE = global i32 0
define void @send_event(i32 %0, i32 %1, i32 %2, i32 %3) {
%5 = alloca i32
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
%9 = alloca %struct.input_event
store i32 %0, i32* %5
store i32 %1, i32* %6
store i32 %2, i32* %7
store i32 %3, i32* %8
%10 = load i32, i32* %6
%11 = getelementptr inbounds %struct.input_event, %struct.input_event* %9, i32 0, i32 0
store i32 %10, i32* %11
%12 = load i32, i32* %7
%13 = getelementptr inbounds %struct.input_event, %struct.input_event* %9, i32 0, i32 1
store i32 %12, i32* %13
%14 = load i32, i32* %8
%15 = getelementptr inbounds %struct.input_event, %struct.input_event* %9, i32 0, i32 2
store i32 %14, i32* %15
%16 = load i32, i32* %5
%17 = call i64 @write(i32 %16, %struct.input_event* %9, i32 12)
%18 = icmp slt i64 %17, 0
br i1 %18, label %19, label %23
19: ; preds = %4
%20 = call i32 @perror(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%21 = load i32, i32* @EXIT_FAILURE
%22 = call i32 @exit(i32 %21)
unreachable
23: ; preds = %4
ret void
}

LLVM IR (-O2):
%struct.input_event = type { i32, i32, i32 }
@.str = [15 x i8] c"error: write()\00"
@EXIT_FAILURE = global i32 0
define void @send_event(i32 %0, i32 %1, i32 %2, i32 %3) {
%5 = alloca %struct.input_event
%6 = bitcast %struct.input_event* %5 to i8*
%7 = getelementptr inbounds %struct.input_event, %struct.input_event* %5, i64 0, i32 0
store i32 %1, i32* %7
%8 = getelementptr inbounds %struct.input_event, %struct.input_event* %5, i64 0, i32 1
store i32 %2, i32* %8
%9 = getelementptr inbounds %struct.input_event, %struct.input_event* %5, i64 0, i32 2
store i32 %3, i32* %9
%10 = call i64 @write(i32 %0, %struct.input_event* %5, i32 12)
%11 = icmp slt i64 %10, 0
br i1 %11, label %12, label %16
12: ; preds = %4
%13 = tail call i32 @perror(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%14 = load i32, i32* @EXIT_FAILURE
%15 = tail call i32 @exit(i32 %14)
unreachable
16: ; preds = %4
ret void
}