#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 */

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int EXIT_FAILURE;
int EXIT_SUCCESS;
int /*<<< orphan*/ IPPROTO_UDP;
int /*<<< orphan*/ O_CLOEXEC;
int /*<<< orphan*/ SOCK_DGRAM;
scalar_t__ dup3(int, int, int /*<<< orphan*/);
int /*<<< orphan*/ errno;
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
int main(void) {
  int sock;
  if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
    fprintf(stderr, "socket() failed: %s\n.", strerror(errno));
    return (EXIT_FAILURE);
  }
  if (dup3(sock, 42, O_CLOEXEC) < 0) {
    fprintf(stderr, "dup3() failed: %s\n.", strerror(errno));
    return (EXIT_FAILURE);
  }
  return (EXIT_SUCCESS);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    0x2e92(%rip),%rax
mov    (%rax),%edi
mov    0x2e81(%rip),%rax
mov    (%rax),%esi
mov    0x2e40(%rip),%rax
mov    (%rax),%edx
call   1060 <socket@plt>
mov    %eax,-0x8(%rbp)
cmp    $0x0,%eax
jge    11b8 <main+0x78>
mov    0x2e4e(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0xc(%rbp)
mov    0x2e3a(%rip),%rax
mov    (%rax),%edi
call   1050 <strerror@plt>
mov    -0xc(%rbp),%edi
mov    %rax,%rdx
lea    0xe5e(%rip),%rsi
call   1040 <fprintf@plt>
mov    0x2e12(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    1221 <main+0xe1>
mov    -0x8(%rbp),%edi
mov    0x2dde(%rip),%rax
mov    (%rax),%edx
mov    $0x2a,%esi
call   1030 <dup3@plt>
cmp    $0x0,%rax
jge    1215 <main+0xd5>
mov    0x2df1(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x10(%rbp)
mov    0x2ddd(%rip),%rax
mov    (%rax),%edi
call   1050 <strerror@plt>
mov    -0x10(%rbp),%edi
mov    %rax,%rdx
lea    0xe17(%rip),%rsi
call   1040 <fprintf@plt>
mov    0x2db5(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    1221 <main+0xe1>
mov    0x2d9c(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
mov    0x2e9e(%rip),%rax
mov    (%rax),%edi
mov    0x2e8d(%rip),%rax
mov    (%rax),%esi
mov    0x2e4c(%rip),%rax
mov    (%rax),%edx
call   1060 <socket@plt>
test   %eax,%eax
js     118a <main+0x4a>
mov    0x2e32(%rip),%rcx
mov    (%rcx),%edx
mov    %eax,%edi
mov    $0x2a,%esi
call   1030 <dup3@plt>
test   %rax,%rax
js     1193 <main+0x53>
mov    0x2e30(%rip),%rax
jmp    11c5 <main+0x85>
lea    0xe6f(%rip),%rbx
jmp    119a <main+0x5a>
lea    0xe7c(%rip),%rbx
mov    0x2e2f(%rip),%rax
mov    (%rax),%ebp
mov    0x2e1e(%rip),%rax
mov    (%rax),%edi
call   1050 <strerror@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %rax,%rdx
call   1040 <fprintf@plt>
mov    0x2dfb(%rip),%rax
mov    (%rax),%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@AF_INET = global i32 0
@SOCK_DGRAM = global i32 0
@IPPROTO_UDP = global i32 0
@stderr = global i32 0
@.str = [22 x i8] c"socket() failed: %s\0A.\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
@O_CLOEXEC = global i32 0
@.str.1 = [20 x i8] c"dup3() failed: %s\0A.\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = load i32, i32* @AF_INET
%4 = load i32, i32* @SOCK_DGRAM
%5 = load i32, i32* @IPPROTO_UDP
%6 = call i32 @socket(i32 %3, i32 %4, i32 %5)
store i32 %6, i32* %2
%7 = icmp slt i32 %6, 0
br i1 %7, label %8, label %14
8: ; preds = %0
%9 = load i32, i32* @stderr
%10 = load i32, i32* @errno
%11 = call i8* @strerror(i32 %10)
%12 = call i32 @fprintf(i32 %9, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i8* %11)
%13 = load i32, i32* @EXIT_FAILURE
store i32 %13, i32* %1
br label %27
14: ; preds = %0
%15 = load i32, i32* %2
%16 = load i32, i32* @O_CLOEXEC
%17 = call i64 @dup3(i32 %15, i32 42, i32 %16)
%18 = icmp slt i64 %17, 0
br i1 %18, label %19, label %25
19: ; preds = %14
%20 = load i32, i32* @stderr
%21 = load i32, i32* @errno
%22 = call i8* @strerror(i32 %21)
%23 = call i32 @fprintf(i32 %20, i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i8* %22)
%24 = load i32, i32* @EXIT_FAILURE
store i32 %24, i32* %1
br label %27
25: ; preds = %14
%26 = load i32, i32* @EXIT_SUCCESS
store i32 %26, i32* %1
br label %27
27: ; preds = %25, %19, %8
%28 = load i32, i32* %1
ret i32 %28
}

LLVM IR (-O2):
@AF_INET = global i32 0
@SOCK_DGRAM = global i32 0
@IPPROTO_UDP = global i32 0
@stderr = global i32 0
@.str = [22 x i8] c"socket() failed: %s\0A.\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
@O_CLOEXEC = global i32 0
@.str.1 = [20 x i8] c"dup3() failed: %s\0A.\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = load i32, i32* @AF_INET
%2 = load i32, i32* @SOCK_DGRAM
%3 = load i32, i32* @IPPROTO_UDP
%4 = tail call i32 @socket(i32 %1, i32 %2, i32 %3)
%5 = icmp slt i32 %4, 0
br i1 %5, label %10, label %6
6: ; preds = %0
%7 = load i32, i32* @O_CLOEXEC
%8 = tail call i64 @dup3(i32 %4, i32 42, i32 %7)
%9 = icmp slt i64 %8, 0
br i1 %9, label %10, label %16
10: ; preds = %6, %0
%11 = phi i8* [ getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), %0 ], [ getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), %6 ]
%12 = load i32, i32* @stderr
%13 = load i32, i32* @errno
%14 = tail call i8* @strerror(i32 %13)
%15 = tail call i32 @fprintf(i32 %12, i8* %11, i8* %14)
br label %16
16: ; preds = %10, %6
%17 = phi i32* [ @EXIT_SUCCESS, %6 ], [ @EXIT_FAILURE, %10 ]
%18 = load i32, i32* %17
ret i32 %18
}