#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 */
typedef int /*<<< orphan*/ buf;

/* Variables and functions */
int /*<<< orphan*/ PATH_MAX;
int /*<<< orphan*/ err(int, char *);
char *getcwd(char *, int);
int /*<<< orphan*/ printf(char *, char *);
int main() {
  char buf[PATH_MAX + 1], *p;
  p = getcwd(buf, sizeof(buf));
  if (p == NULL) {
    err(1, ".");
  }
  printf("%s\n", buf);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    0x2eaa(%rip),%rax
mov    (%rax),%eax
add    $0x1,%eax
mov    %rsp,%rcx
mov    %rcx,-0x10(%rbp)
mov    %rax,%rcx
add    $0xf,%rcx
and    $0xfffffffffffffff0,%rcx
mov    %rsp,%rdi
sub    %rcx,%rdi
mov    %rdi,-0x28(%rbp)
mov    %rdi,%rsp
mov    %rax,-0x18(%rbp)
mov    %eax,%esi
call   1040 <getcwd@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    1195 <main+0x65>
mov    $0x1,%edi
lea    0xe70(%rip),%rsi
call   1050 <err@plt>
mov    -0x28(%rbp),%rsi
lea    0xe62(%rip),%rdi
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x10(%rbp),%rax
mov    %rax,%rsp
mov    -0x4(%rbp),%eax
mov    %rbp,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
mov    %rsp,%rbp
push   %rbx
push   %rax
mov    0x2eb3(%rip),%rax
mov    (%rax),%esi
add    $0x1,%esi
mov    %rsp,%rbx
lea    0xf(%rsi),%rax
and    $0xfffffffffffffff0,%rax
sub    %rax,%rbx
mov    %rbx,%rsp
mov    %rbx,%rdi
call   1040 <getcwd@plt>
test   %rax,%rax
jne    1171 <main+0x41>
lea    0xe99(%rip),%rsi
mov    $0x1,%edi
call   1050 <err@plt>
lea    0xe8a(%rip),%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
xor    %eax,%eax
lea    -0x8(%rbp),%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@PATH_MAX = global i32 0
@.str = [2 x i8] c".\00"
@.str.1 = [4 x i8] c"%s\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8*
%3 = alloca i64
%4 = alloca i8*
store i32 0, i32* %1
%5 = load i32, i32* @PATH_MAX
%6 = add nsw i32 %5, 1
%7 = zext i32 %6 to i64
%8 = call i8* @llvm.stacksave()
store i8* %8, i8** %2
%9 = alloca i8, i64 %7
store i64 %7, i64* %3
%10 = trunc i64 %7 to i32
%11 = call i8* @getcwd(i8* %9, i32 %10)
store i8* %11, i8** %4
%12 = load i8*, i8** %4
%13 = icmp eq i8* %12, null
br i1 %13, label %14, label %16
14: ; preds = %0
%15 = call i32 @err(i32 1, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
br label %16
16: ; preds = %14, %0
%17 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %9)
store i32 0, i32* %1
%18 = load i8*, i8** %2
%19 = load i32, i32* %1
ret i32 %19
}

LLVM IR (-O2):
@PATH_MAX = global i32 0
@.str = [2 x i8] c".\00"
@.str.1 = [4 x i8] c"%s\0A\00"
define i32 @main() {
%1 = load i32, i32* @PATH_MAX
%2 = add nsw i32 %1, 1
%3 = zext i32 %2 to i64
%4 = alloca i8, i64 %3
%5 = call i8* @getcwd(i8* %4, i32 %2)
%6 = icmp eq i8* %5, null
br i1 %6, label %7, label %9
7: ; preds = %0
%8 = call i32 @err(i32 1, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
br label %9
9: ; preds = %7, %0
%10 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %4)
ret i32 0
}