#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 {
  char *sun_path;
  int /*<<< orphan*/ sun_family;
};
struct sockaddr {
  int dummy;
};

/* Variables and functions */
int /*<<< orphan*/ AF_UNIX;
int /*<<< orphan*/ SOCK_STREAM;
scalar_t__ connect(int, struct sockaddr *, int);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ perror(char *);
int /*<<< orphan*/ printf(char *);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ stderr;
int /*<<< orphan*/ strncpy(char *, char const *, int);
int connect_unix_socket(const char *sockpath) {
  int s;
  struct sockaddr_un addr;
  s = socket(AF_UNIX, SOCK_STREAM, 0);
  addr.sun_family = AF_UNIX;
  strncpy(addr.sun_path, sockpath, sizeof(addr.sun_path));
  if (connect(s, (struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0) {
    fprintf(stderr, "connecting to %s\n", addr.sun_path);
    perror("connect");
    exit(1);
  }
  printf("Connected.\n");
  return s;
}


x86 assembly (clang, -O0):
<connect_unix_socket>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    0x2e65(%rip),%rax
mov    (%rax),%edi
mov    0x2e44(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,-0xc(%rbp)
mov    0x2e49(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x18(%rbp)
mov    -0x20(%rbp),%rdi
mov    -0x8(%rbp),%rsi
mov    $0x8,%edx
call   1030 <strncpy@plt>
mov    -0xc(%rbp),%edi
lea    -0x20(%rbp),%rsi
mov    $0x10,%edx
call   1080 <connect@plt>
cmp    $0x0,%rax
jge    1200 <connect_unix_socket+0x90>
mov    0x2e00(%rip),%rax
mov    (%rax),%edi
mov    -0x20(%rbp),%rdx
lea    0xe1b(%rip),%rsi
call   1050 <fprintf@plt>
lea    0xe21(%rip),%rdi
call   1060 <perror@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
lea    0xe13(%rip),%rdi
call   1040 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<connect_unix_socket>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
mov    %rdi,%r14
mov    0x2e65(%rip),%r15
mov    (%r15),%edi
mov    0x2e43(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,%ebx
mov    (%r15),%eax
mov    %eax,0x8(%rsp)
mov    %r14,%rsi
mov    $0x8,%edx
call   1030 <strncpy@plt>
mov    %rsp,%rsi
mov    %ebx,%edi
mov    $0x10,%edx
call   1080 <connect@plt>
test   %rax,%rax
js     11d8 <connect_unix_socket+0x68>
lea    0xe53(%rip),%rdi
call   1040 <puts@plt>
mov    %ebx,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret
mov    0x2df9(%rip),%rax
mov    (%rax),%edi
mov    (%rsp),%rdx
lea    0xe14(%rip),%rsi
call   1050 <fprintf@plt>
lea    0xe1a(%rip),%rdi
call   1060 <perror@plt>
mov    $0x1,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
%struct.sockaddr_un = type { i8*, i32 }
%struct.sockaddr = type { i32 }
@AF_UNIX = global i32 0
@SOCK_STREAM = global i32 0
@stderr = global i32 0
@.str = [18 x i8] c"connecting to %s\0A\00"
@.str.1 = [8 x i8] c"connect\00"
@.str.2 = [12 x i8] c"Connected.\0A\00"
define i32 @connect_unix_socket(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
%4 = alloca %struct.sockaddr_un
store i8* %0, i8** %2
%5 = load i32, i32* @AF_UNIX
%6 = load i32, i32* @SOCK_STREAM
%7 = call i32 @socket(i32 %5, i32 %6, i32 0)
store i32 %7, i32* %3
%8 = load i32, i32* @AF_UNIX
%9 = getelementptr inbounds %struct.sockaddr_un, %struct.sockaddr_un* %4, i32 0, i32 1
store i32 %8, i32* %9
%10 = getelementptr inbounds %struct.sockaddr_un, %struct.sockaddr_un* %4, i32 0, i32 0
%11 = load i8*, i8** %10
%12 = load i8*, i8** %2
%13 = call i32 @strncpy(i8* %11, i8* %12, i32 8)
%14 = load i32, i32* %3
%15 = bitcast %struct.sockaddr_un* %4 to %struct.sockaddr*
%16 = call i64 @connect(i32 %14, %struct.sockaddr* %15, i32 16)
%17 = icmp slt i64 %16, 0
br i1 %17, label %18, label %25
18: ; preds = %1
%19 = load i32, i32* @stderr
%20 = getelementptr inbounds %struct.sockaddr_un, %struct.sockaddr_un* %4, i32 0, i32 0
%21 = load i8*, i8** %20
%22 = call i32 @fprintf(i32 %19, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i8* %21)
%23 = call i32 @perror(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0))
%24 = call i32 @exit(i32 1)
unreachable
25: ; preds = %1
%26 = call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0))
%27 = load i32, i32* %3
ret i32 %27
}

LLVM IR (-O2):
%struct.sockaddr_un = type { i8*, i32 }
%struct.sockaddr = type { i32 }
@AF_UNIX = global i32 0
@SOCK_STREAM = global i32 0
@stderr = global i32 0
@.str = [18 x i8] c"connecting to %s\0A\00"
@.str.1 = [8 x i8] c"connect\00"
@str = [11 x i8] c"Connected.\00"
define i32 @connect_unix_socket(i8* %0) {
%2 = alloca %struct.sockaddr_un
%3 = bitcast %struct.sockaddr_un* %2 to i8*
%4 = load i32, i32* @AF_UNIX
%5 = load i32, i32* @SOCK_STREAM
%6 = tail call i32 @socket(i32 %4, i32 %5, i32 0)
%7 = load i32, i32* @AF_UNIX
%8 = getelementptr inbounds %struct.sockaddr_un, %struct.sockaddr_un* %2, i64 0, i32 1
store i32 %7, i32* %8
%9 = tail call i32 @strncpy(i8* undef, i8* %0, i32 8)
%10 = bitcast %struct.sockaddr_un* %2 to %struct.sockaddr*
%11 = call i64 @connect(i32 %6, %struct.sockaddr* %10, i32 16)
%12 = icmp slt i64 %11, 0
br i1 %12, label %13, label %20
13: ; preds = %1
%14 = getelementptr inbounds %struct.sockaddr_un, %struct.sockaddr_un* %2, i64 0, i32 0
%15 = load i32, i32* @stderr
%16 = load i8*, i8** %14
%17 = call i32 @fprintf(i32 %15, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i8* %16)
%18 = call i32 @perror(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0))
%19 = call i32 @exit(i32 1)
unreachable
20: ; preds = %1
%21 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str, i64 0, i64 0))
ret i32 %6
}