#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_TCP;
int /*<<< orphan*/ SOCK_STREAM;
int dup(int);
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_STREAM, IPPROTO_TCP)) < 0) {
    fprintf(stderr, "socket() failed: %s\n.", strerror(errno));
    return (EXIT_FAILURE);
  }
  if (dup(42) != -1)
    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    0x2e69(%rip),%rax
mov    (%rax),%esi
mov    0x2e78(%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    0x2e32(%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    0x2e0a(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    11e8 <main+0xa8>
mov    $0x2a,%edi
call   1030 <dup@plt>
cmp    $0xffffffff,%eax
je     11dc <main+0x9c>
mov    0x2de6(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    11e8 <main+0xa8>
mov    0x2dcd(%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   %rbx
mov    0x2ea0(%rip),%rax
mov    (%rax),%edi
mov    0x2e77(%rip),%rax
mov    (%rax),%esi
mov    0x2e86(%rip),%rax
mov    (%rax),%edx
call   1060 <socket@plt>
test   %eax,%eax
js     117d <main+0x3d>
mov    $0x2a,%edi
call   1030 <dup@plt>
cmp    $0xffffffff,%eax
jne    11a5 <main+0x65>
mov    0x2e35(%rip),%rax
jmp    11ac <main+0x6c>
mov    0x2e4c(%rip),%rax
mov    (%rax),%ebx
mov    0x2e33(%rip),%rax
mov    (%rax),%edi
call   1050 <strerror@plt>
lea    0xe65(%rip),%rsi
mov    %ebx,%edi
mov    %rax,%rdx
call   1040 <fprintf@plt>
mov    0x2e0c(%rip),%rax
mov    (%rax),%eax
pop    %rbx
ret

LLVM IR (-O0):
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@IPPROTO_TCP = 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
@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_STREAM
%5 = load i32, i32* @IPPROTO_TCP
%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 %21
14: ; preds = %0
%15 = call i32 @dup(i32 42)
%16 = icmp ne i32 %15, -1
br i1 %16, label %17, label %19
17: ; preds = %14
%18 = load i32, i32* @EXIT_FAILURE
store i32 %18, i32* %1
br label %21
19: ; preds = %14
%20 = load i32, i32* @EXIT_SUCCESS
store i32 %20, i32* %1
br label %21
21: ; preds = %19, %17, %8
%22 = load i32, i32* %1
ret i32 %22
}

LLVM IR (-O2):
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@IPPROTO_TCP = 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
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = load i32, i32* @AF_INET
%2 = load i32, i32* @SOCK_STREAM
%3 = load i32, i32* @IPPROTO_TCP
%4 = tail call i32 @socket(i32 %1, i32 %2, i32 %3)
%5 = icmp slt i32 %4, 0
br i1 %5, label %6, label %11
6: ; preds = %0
%7 = load i32, i32* @stderr
%8 = load i32, i32* @errno
%9 = tail call i8* @strerror(i32 %8)
%10 = tail call i32 @fprintf(i32 %7, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i8* %9)
br label %15
11: ; preds = %0
%12 = tail call i32 @dup(i32 42)
%13 = icmp eq i32 %12, -1
%14 = select i1 %13, i32* @EXIT_SUCCESS, i32* @EXIT_FAILURE
br label %15
15: ; preds = %11, %6
%16 = phi i32* [ @EXIT_FAILURE, %6 ], [ %14, %11 ]
%17 = load i32, i32* %16
ret i32 %17
}