#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*/ printf(char *, char *);
char *relpath(char *);
int /*<<< orphan*/ setreldir(char *);
int main(void) {
  setreldir("/home");
  printf("%s\n", relpath("hax"));
  printf("%s\n", relpath("/hax$HOME"));
  printf("%s\n", relpath("$HOME"));
  printf("%s\n", relpath("/etc/../home/../etc"));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
call   1050 <setreldir@plt>
lea    0xeb8(%rip),%rdi
call   1040 <relpath@plt>
mov    %rax,%rsi
lea    0xea5(%rip),%rdi
call   1030 <printf@plt>
lea    0xea1(%rip),%rdi
call   1040 <relpath@plt>
mov    %rax,%rsi
lea    0xe8a(%rip),%rdi
call   1030 <printf@plt>
lea    0xe8a(%rip),%rdi
call   1040 <relpath@plt>
mov    %rax,%rsi
lea    0xe6f(%rip),%rdi
call   1030 <printf@plt>
lea    0xe75(%rip),%rdi
call   1040 <relpath@plt>
mov    %rax,%rsi
lea    0xe54(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xec8(%rip),%rdi
call   1050 <setreldir@plt>
lea    0xec6(%rip),%rdi
call   1040 <relpath@plt>
lea    0xeb6(%rip),%rbx
mov    %rbx,%rdi
mov    %rax,%rsi
call   1030 <printf@plt>
lea    0xeac(%rip),%rdi
call   1040 <relpath@plt>
mov    %rbx,%rdi
mov    %rax,%rsi
call   1030 <printf@plt>
lea    0xe99(%rip),%rdi
call   1040 <relpath@plt>
mov    %rbx,%rdi
mov    %rax,%rsi
call   1030 <printf@plt>
lea    0xe88(%rip),%rdi
call   1040 <relpath@plt>
mov    %rbx,%rdi
mov    %rax,%rsi
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [6 x i8] c"/home\00"
@.str.1 = [4 x i8] c"%s\0A\00"
@.str.2 = [4 x i8] c"hax\00"
@.str.3 = [10 x i8] c"/hax$HOME\00"
@.str.4 = [6 x i8] c"$HOME\00"
@.str.5 = [20 x i8] c"/etc/../home/../etc\00"
define i32 @main() {
%1 = alloca i32
store i32 0, i32* %1
%2 = call i32 @setreldir(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0))
%3 = call i8* @relpath(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %3)
%5 = call i8* @relpath(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %5)
%7 = call i8* @relpath(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %7)
%9 = call i8* @relpath(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.5, i64 0, i64 0))
%10 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %9)
ret i32 0
}

LLVM IR (-O2):
@.str = [6 x i8] c"/home\00"
@.str.1 = [4 x i8] c"%s\0A\00"
@.str.2 = [4 x i8] c"hax\00"
@.str.3 = [10 x i8] c"/hax$HOME\00"
@.str.4 = [6 x i8] c"$HOME\00"
@.str.5 = [20 x i8] c"/etc/../home/../etc\00"
define i32 @main() {
%1 = tail call i32 @setreldir(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0))
%2 = tail call i8* @relpath(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%3 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %2)
%4 = tail call i8* @relpath(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
%5 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %4)
%6 = tail call i8* @relpath(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0))
%7 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %6)
%8 = tail call i8* @relpath(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.5, i64 0, i64 0))
%9 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %8)
ret i32 0
}