#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 /*<<< orphan*/ yes;

/* Variables and functions */
int /*<<< orphan*/ SOL_SOCKET;
int /*<<< orphan*/ SO_KEEPALIVE;
int /*<<< orphan*/ errno;
int /*<<< orphan*/ kr_net_set_error(char *, char *, int /*<<< orphan*/);
int setsockopt(int, int /*<<< orphan*/, int /*<<< orphan*/, int *, int);
int /*<<< orphan*/ strerror(int /*<<< orphan*/);
int kr_net_tcp_keepalive(char *err, int fd) {
  int yes = 1;
  if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) == -1) {
    kr_net_set_error(err, "setsockopt SO_KEEPALIVE: %s", strerror(errno));
    return -1;
  }
  return 0;
}


x86 assembly (clang, -O0):
<kr_net_tcp_keepalive>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    %esi,-0x14(%rbp)
movl   $0x1,-0x18(%rbp)
mov    -0x14(%rbp),%edi
mov    0x2e98(%rip),%rax
mov    (%rax),%esi
mov    0x2e6f(%rip),%rax
mov    (%rax),%edx
lea    -0x18(%rbp),%rcx
mov    $0x4,%r8d
call   1030 <setsockopt@plt>
cmp    $0xffffffff,%eax
jne    11a7 <kr_net_tcp_keepalive+0x77>
mov    -0x10(%rbp),%rax
mov    %rax,-0x20(%rbp)
mov    0x2e56(%rip),%rax
mov    (%rax),%edi
call   1050 <strerror@plt>
mov    -0x20(%rbp),%rdi
mov    %eax,%edx
lea    0xe6a(%rip),%rsi
call   1040 <kr_net_set_error@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11ae <kr_net_tcp_keepalive+0x7e>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<kr_net_tcp_keepalive>:
push   %rbx
sub    $0x10,%rsp
mov    %esi,%eax
mov    %rdi,%rbx
movl   $0x1,0xc(%rsp)
mov    0x2e9f(%rip),%rcx
mov    (%rcx),%esi
mov    0x2e76(%rip),%rcx
mov    (%rcx),%edx
lea    0xc(%rsp),%rcx
mov    %eax,%edi
mov    $0x4,%r8d
call   1030 <setsockopt@plt>
mov    %eax,%ecx
xor    %eax,%eax
cmp    $0xffffffff,%ecx
jne    1193 <kr_net_tcp_keepalive+0x63>
mov    0x2e62(%rip),%rax
mov    (%rax),%edi
call   1050 <strerror@plt>
lea    0xe7c(%rip),%rsi
mov    %rbx,%rdi
mov    %eax,%edx
call   1040 <kr_net_set_error@plt>
mov    $0xffffffff,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@SOL_SOCKET = global i32 0
@SO_KEEPALIVE = global i32 0
@.str = [28 x i8] c"setsockopt SO_KEEPALIVE: %s\00"
@errno = global i32 0
define i32 @kr_net_tcp_keepalive(i8* %0, i32 %1) {
%3 = alloca i32
%4 = alloca i8*
%5 = alloca i32
%6 = alloca i32
store i8* %0, i8** %4
store i32 %1, i32* %5
store i32 1, i32* %6
%7 = load i32, i32* %5
%8 = load i32, i32* @SOL_SOCKET
%9 = load i32, i32* @SO_KEEPALIVE
%10 = call i32 @setsockopt(i32 %7, i32 %8, i32 %9, i32* %6, i32 4)
%11 = icmp eq i32 %10, -1
br i1 %11, label %12, label %17
12: ; preds = %2
%13 = load i8*, i8** %4
%14 = load i32, i32* @errno
%15 = call i32 @strerror(i32 %14)
%16 = call i32 @kr_net_set_error(i8* %13, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0), i32 %15)
store i32 -1, i32* %3
br label %18
17: ; preds = %2
store i32 0, i32* %3
br label %18
18: ; preds = %17, %12
%19 = load i32, i32* %3
ret i32 %19
}

LLVM IR (-O2):
@SOL_SOCKET = global i32 0
@SO_KEEPALIVE = global i32 0
@.str = [28 x i8] c"setsockopt SO_KEEPALIVE: %s\00"
@errno = global i32 0
define i32 @kr_net_tcp_keepalive(i8* %0, i32 %1) {
%3 = alloca i32
%4 = bitcast i32* %3 to i8*
store i32 1, i32* %3
%5 = load i32, i32* @SOL_SOCKET
%6 = load i32, i32* @SO_KEEPALIVE
%7 = call i32 @setsockopt(i32 %1, i32 %5, i32 %6, i32* %3, i32 4)
%8 = icmp eq i32 %7, -1
br i1 %8, label %9, label %13
9: ; preds = %2
%10 = load i32, i32* @errno
%11 = call i32 @strerror(i32 %10)
%12 = call i32 @kr_net_set_error(i8* %0, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0), i32 %11)
br label %13
13: ; preds = %2, %9
%14 = phi i32 [ -1, %9 ], [ 0, %2 ]
ret i32 %14
}