#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 sockaddr_in {
  int /*<<< orphan*/ sin_addr;
  int /*<<< orphan*/ sin_port;
  int /*<<< orphan*/ sin_family;
};
struct sockaddr {
  int dummy;
};
typedef int /*<<< orphan*/ data;
typedef int /*<<< orphan*/ addr;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int EXIT_FAILURE;
int EXIT_SUCCESS;
int /*<<< orphan*/ IPPROTO_UDP;
int /*<<< orphan*/ SOCK_DGRAM;
int /*<<< orphan*/ errno;
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ htons(int);
int /*<<< orphan*/ inet_aton(char *, int /*<<< orphan*/ *);
scalar_t__ sendto(int, int *, int, int /*<<< orphan*/, struct sockaddr *, int);
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);
  }
  struct sockaddr_in addr;
  addr.sin_family = AF_INET;
  addr.sin_port = htons(8000);
  inet_aton("127.0.0.1", &addr.sin_addr);
  int data = 42;
  if (sendto(sock, &data, sizeof(data), 0, (struct sockaddr *)&addr,
             sizeof(addr)) < 0) {
    fprintf(stderr, "sendto() failed: %s\n.", strerror(errno));
    return (EXIT_FAILURE);
  }
  return (EXIT_SUCCESS);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    0x2e72(%rip),%rax
mov    (%rax),%edi
mov    0x2e61(%rip),%rax
mov    (%rax),%esi
mov    0x2e20(%rip),%rax
mov    (%rax),%edx
call   1080 <socket@plt>
mov    %eax,-0x8(%rbp)
cmp    $0x0,%eax
jge    11d8 <main+0x78>
mov    0x2e2e(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x20(%rbp)
mov    0x2e1a(%rip),%rax
mov    (%rax),%edi
call   1070 <strerror@plt>
mov    -0x20(%rbp),%edi
mov    %rax,%rdx
lea    0xe3e(%rip),%rsi
call   1050 <fprintf@plt>
mov    0x2df2(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    1278 <main+0x118>
mov    0x2e09(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x10(%rbp)
mov    $0x1f40,%edi
call   1030 <htons@plt>
mov    %eax,-0x14(%rbp)
lea    -0x18(%rbp),%rsi
lea    0xe1a(%rip),%rdi
call   1060 <inet_aton@plt>
movl   $0x2a,-0x1c(%rbp)
mov    -0x8(%rbp),%edi
lea    -0x18(%rbp),%r8
lea    -0x1c(%rbp),%rsi
mov    $0x4,%edx
xor    %ecx,%ecx
mov    $0xc,%r9d
call   1040 <sendto@plt>
cmp    $0x0,%rax
jge    126c <main+0x10c>
mov    0x2d9a(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x24(%rbp)
mov    0x2d86(%rip),%rax
mov    (%rax),%edi
call   1070 <strerror@plt>
mov    -0x24(%rbp),%edi
mov    %rax,%rdx
lea    0xdca(%rip),%rsi
call   1050 <fprintf@plt>
mov    0x2d5e(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    1278 <main+0x118>
mov    0x2d45(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0x18,%rsp
mov    0x2e7a(%rip),%r14
mov    (%r14),%edi
mov    0x2e68(%rip),%rax
mov    (%rax),%esi
mov    0x2e27(%rip),%rax
mov    (%rax),%edx
call   1080 <socket@plt>
test   %eax,%eax
js     11e9 <main+0x89>
mov    %eax,%ebx
mov    (%r14),%eax
mov    %eax,0x10(%rsp)
mov    $0x1f40,%edi
call   1030 <htons@plt>
mov    %eax,0xc(%rsp)
lea    0xe6c(%rip),%rdi
lea    0x8(%rsp),%r14
mov    %r14,%rsi
call   1060 <inet_aton@plt>
movl   $0x2a,0x4(%rsp)
lea    0x4(%rsp),%rsi
mov    %ebx,%edi
mov    $0x4,%edx
xor    %ecx,%ecx
mov    %r14,%r8
mov    $0xc,%r9d
call   1040 <sendto@plt>
test   %rax,%rax
js     1209 <main+0xa9>
mov    0x2dd1(%rip),%rax
jmp    1238 <main+0xd8>
mov    0x2de0(%rip),%rax
mov    (%rax),%ebx
mov    0x2dcf(%rip),%rax
mov    (%rax),%edi
call   1070 <strerror@plt>
lea    0xdf9(%rip),%rsi
jmp    1227 <main+0xc7>
mov    0x2dc0(%rip),%rax
mov    (%rax),%ebx
mov    0x2daf(%rip),%rax
mov    (%rax),%edi
call   1070 <strerror@plt>
lea    0xdf9(%rip),%rsi
mov    %ebx,%edi
mov    %rax,%rdx
call   1050 <fprintf@plt>
mov    0x2d88(%rip),%rax
mov    (%rax),%eax
add    $0x18,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
%struct.sockaddr_in = type { i32, i32, i32 }
%struct.sockaddr = type { i32 }
@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
@.str.1 = [10 x i8] c"127.0.0.1\00"
@.str.2 = [22 x i8] c"sendto() failed: %s\0A.\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca %struct.sockaddr_in
%4 = alloca i32
store i32 0, i32* %1
%5 = load i32, i32* @AF_INET
%6 = load i32, i32* @SOCK_DGRAM
%7 = load i32, i32* @IPPROTO_UDP
%8 = call i32 @socket(i32 %5, i32 %6, i32 %7)
store i32 %8, i32* %2
%9 = icmp slt i32 %8, 0
br i1 %9, label %10, label %16
10: ; preds = %0
%11 = load i32, i32* @stderr
%12 = load i32, i32* @errno
%13 = call i8* @strerror(i32 %12)
%14 = call i32 @fprintf(i32 %11, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i8* %13)
%15 = load i32, i32* @EXIT_FAILURE
store i32 %15, i32* %1
br label %35
16: ; preds = %0
%17 = load i32, i32* @AF_INET
%18 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i32 0, i32 2
store i32 %17, i32* %18
%19 = call i32 @htons(i32 8000)
%20 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i32 0, i32 1
store i32 %19, i32* %20
%21 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i32 0, i32 0
%22 = call i32 @inet_aton(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i32* %21)
store i32 42, i32* %4
%23 = load i32, i32* %2
%24 = bitcast %struct.sockaddr_in* %3 to %struct.sockaddr*
%25 = call i64 @sendto(i32 %23, i32* %4, i32 4, i32 0, %struct.sockaddr* %24, i32 12)
%26 = icmp slt i64 %25, 0
br i1 %26, label %27, label %33
27: ; preds = %16
%28 = load i32, i32* @stderr
%29 = load i32, i32* @errno
%30 = call i8* @strerror(i32 %29)
%31 = call i32 @fprintf(i32 %28, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, i64 0, i64 0), i8* %30)
%32 = load i32, i32* @EXIT_FAILURE
store i32 %32, i32* %1
br label %35
33: ; preds = %16
%34 = load i32, i32* @EXIT_SUCCESS
store i32 %34, i32* %1
br label %35
35: ; preds = %33, %27, %10
%36 = load i32, i32* %1
ret i32 %36
}

LLVM IR (-O2):
%struct.sockaddr_in = type { i32, i32, i32 }
%struct.sockaddr = type { i32 }
@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
@.str.1 = [10 x i8] c"127.0.0.1\00"
@.str.2 = [22 x i8] c"sendto() failed: %s\0A.\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = alloca %struct.sockaddr_in
%2 = alloca i32
%3 = load i32, i32* @AF_INET
%4 = load i32, i32* @SOCK_DGRAM
%5 = load i32, i32* @IPPROTO_UDP
%6 = tail call i32 @socket(i32 %3, i32 %4, i32 %5)
%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 = tail call i8* @strerror(i32 %10)
%12 = tail 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
br label %34
14: ; preds = %0
%15 = bitcast %struct.sockaddr_in* %1 to i8*
%16 = load i32, i32* @AF_INET
%17 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %1, i64 0, i32 2
store i32 %16, i32* %17
%18 = tail call i32 @htons(i32 8000)
%19 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %1, i64 0, i32 1
store i32 %18, i32* %19
%20 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %1, i64 0, i32 0
%21 = call i32 @inet_aton(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i32* %20)
%22 = bitcast i32* %2 to i8*
store i32 42, i32* %2
%23 = bitcast %struct.sockaddr_in* %1 to %struct.sockaddr*
%24 = call i64 @sendto(i32 %6, i32* %2, i32 4, i32 0, %struct.sockaddr* %23, i32 12)
%25 = icmp slt i64 %24, 0
br i1 %25, label %26, label %31
26: ; preds = %14
%27 = load i32, i32* @stderr
%28 = load i32, i32* @errno
%29 = call i8* @strerror(i32 %28)
%30 = call i32 @fprintf(i32 %27, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, i64 0, i64 0), i8* %29)
br label %31
31: ; preds = %14, %26
%32 = phi i32* [ @EXIT_FAILURE, %26 ], [ @EXIT_SUCCESS, %14 ]
%33 = load i32, i32* %32
br label %34
34: ; preds = %31, %8
%35 = phi i32 [ %13, %8 ], [ %33, %31 ]
ret i32 %35
}