#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_un {
  int /*<<< orphan*/ sun_path;
  int /*<<< orphan*/ sun_family;
};
struct sockaddr {
  int dummy;
};
typedef int /*<<< orphan*/ servaddr;
typedef int /*<<< orphan*/ cliaddr;

/* Variables and functions */
int /*<<< orphan*/ AF_LOCAL;
int /*<<< orphan*/ SOCK_DGRAM;
int /*<<< orphan*/ bind(int, struct sockaddr *, int);
int /*<<< orphan*/ dg_echo(int, struct sockaddr *, int);
int /*<<< orphan*/ memset(struct sockaddr_un *, int /*<<< orphan*/, int);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ strcpy(int /*<<< orphan*/, char *);
int /*<<< orphan*/ unlink(char *);
int main(int argc, char *argv[]) {
  int sockfd;
  struct sockaddr_un servaddr, cliaddr;
  sockfd = socket(AF_LOCAL, SOCK_DGRAM, 0);
  unlink("/tmp/unix.dg");
  memset(&servaddr, 0, sizeof(servaddr));
  servaddr.sun_family = AF_LOCAL;
  strcpy(servaddr.sun_path, "/tmp/unix.dg");
  bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
  dg_echo(sockfd, (struct sockaddr *)&cliaddr, sizeof(cliaddr));
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
mov    0x2e72(%rip),%rax
mov    (%rax),%edi
mov    0x2e61(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1080 <socket@plt>
mov    %eax,-0x14(%rbp)
lea    0xe6e(%rip),%rdi
call   1040 <unlink@plt>
lea    -0x20(%rbp),%rdi
xor    %esi,%esi
mov    $0x8,%edx
call   1060 <memset@plt>
mov    0x2e3a(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x1c(%rbp)
mov    -0x20(%rbp),%edi
lea    0xe43(%rip),%rsi
call   1050 <strcpy@plt>
mov    -0x14(%rbp),%edi
lea    -0x20(%rbp),%rsi
mov    $0x8,%edx
call   1070 <bind@plt>
mov    -0x14(%rbp),%edi
lea    -0x28(%rbp),%rsi
mov    $0x8,%edx
call   1030 <dg_echo@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x18,%rsp
mov    0x2e76(%rip),%r12
mov    (%r12),%edi
mov    0x2e63(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1080 <socket@plt>
mov    %eax,%ebx
lea    0xe71(%rip),%r14
mov    %r14,%rdi
call   1040 <unlink@plt>
lea    0x8(%rsp),%r15
mov    %r15,%rdi
xor    %esi,%esi
mov    $0x8,%edx
call   1060 <memset@plt>
mov    (%r12),%eax
mov    %eax,0xc(%rsp)
mov    0x8(%rsp),%edi
mov    %r14,%rsi
call   1050 <strcpy@plt>
mov    %ebx,%edi
mov    %r15,%rsi
mov    $0x8,%edx
call   1070 <bind@plt>
lea    0x10(%rsp),%rsi
mov    %ebx,%edi
mov    $0x8,%edx
call   1030 <dg_echo@plt>
xor    %eax,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
%struct.sockaddr_un = type { i32, i32 }
%struct.sockaddr = type { i32 }
@AF_LOCAL = global i32 0
@SOCK_DGRAM = global i32 0
@.str = [13 x i8] c"/tmp/unix.dg\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i8**
%5 = alloca i32
%6 = alloca %struct.sockaddr_un
%7 = alloca %struct.sockaddr_un
store i32 %0, i32* %3
store i8** %1, i8*** %4
%8 = load i32, i32* @AF_LOCAL
%9 = load i32, i32* @SOCK_DGRAM
%10 = call i32 @socket(i32 %8, i32 %9, i32 0)
store i32 %10, i32* %5
%11 = call i32 @unlink(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
%12 = call i32 @memset(%struct.sockaddr_un* %6, i32 0, i32 8)
%13 = load i32, i32* @AF_LOCAL
%14 = getelementptr inbounds %struct.sockaddr_un, %struct.sockaddr_un* %6, i32 0, i32 1
store i32 %13, i32* %14
%15 = getelementptr inbounds %struct.sockaddr_un, %struct.sockaddr_un* %6, i32 0, i32 0
%16 = load i32, i32* %15
%17 = call i32 @strcpy(i32 %16, i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
%18 = load i32, i32* %5
%19 = bitcast %struct.sockaddr_un* %6 to %struct.sockaddr*
%20 = call i32 @bind(i32 %18, %struct.sockaddr* %19, i32 8)
%21 = load i32, i32* %5
%22 = bitcast %struct.sockaddr_un* %7 to %struct.sockaddr*
%23 = call i32 @dg_echo(i32 %21, %struct.sockaddr* %22, i32 8)
ret i32 0
}

LLVM IR (-O2):
%struct.sockaddr_un = type { i32, i32 }
%struct.sockaddr = type { i32 }
@AF_LOCAL = global i32 0
@SOCK_DGRAM = global i32 0
@.str = [13 x i8] c"/tmp/unix.dg\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca %struct.sockaddr_un
%4 = alloca %struct.sockaddr_un
%5 = bitcast %struct.sockaddr_un* %3 to i8*
%6 = bitcast %struct.sockaddr_un* %4 to i8*
%7 = load i32, i32* @AF_LOCAL
%8 = load i32, i32* @SOCK_DGRAM
%9 = tail call i32 @socket(i32 %7, i32 %8, i32 0)
%10 = tail call i32 @unlink(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
%11 = call i32 @memset(%struct.sockaddr_un* %3, i32 0, i32 8)
%12 = load i32, i32* @AF_LOCAL
%13 = getelementptr inbounds %struct.sockaddr_un, %struct.sockaddr_un* %3, i64 0, i32 1
store i32 %12, i32* %13
%14 = getelementptr inbounds %struct.sockaddr_un, %struct.sockaddr_un* %3, i64 0, i32 0
%15 = load i32, i32* %14
%16 = call i32 @strcpy(i32 %15, i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
%17 = bitcast %struct.sockaddr_un* %3 to %struct.sockaddr*
%18 = call i32 @bind(i32 %9, %struct.sockaddr* %17, i32 8)
%19 = bitcast %struct.sockaddr_un* %4 to %struct.sockaddr*
%20 = call i32 @dg_echo(i32 %9, %struct.sockaddr* %19, i32 8)
ret i32 0
}