#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*/ grant_shell();
int /*<<< orphan*/ printf(char *, ...);
scalar_t__ verify(char *);
int main(int argc, char **argv) {
  if (argc != 2) {
    printf("Usage: %s passwd\n", *argv);
    return 1;
  }
  if (verify(argv[1])) {
    grant_shell();
  } else {
    printf("You're not the superuser, you don't know the password!!\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
je     1171 <main+0x41>
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
lea    0xea2(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x1,-0x4(%rbp)
jmp    11a9 <main+0x79>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1050 <verify@plt>
cmp    $0x0,%rax
je     1194 <main+0x64>
mov    $0x0,%al
call   1030 <grant_shell@plt>
jmp    11a2 <main+0x72>
lea    0xe77(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jne    115f <main+0x1f>
mov    0x8(%rsi),%rdi
call   1060 <verify@plt>
test   %rax,%rax
je     1177 <main+0x37>
xor    %ebx,%ebx
xor    %eax,%eax
call   1040 <grant_shell@plt>
jmp    1185 <main+0x45>
mov    (%rsi),%rsi
lea    0xe97(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0x1,%ebx
jmp    1185 <main+0x45>
lea    0xe94(%rip),%rdi
call   1030 <puts@plt>
xor    %ebx,%ebx
mov    %ebx,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [18 x i8] c"Usage: %s passwd\0A\00"
@.str.1 = [57 x i8] c"You're not the superuser, you don't know the password!!\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = load i32, i32* %4
%7 = icmp ne i32 %6, 2
br i1 %7, label %8, label %12
8: ; preds = %2
%9 = load i8**, i8*** %5
%10 = load i8*, i8** %9
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i8* %10)
store i32 1, i32* %3
br label %23
12: ; preds = %2
%13 = load i8**, i8*** %5
%14 = getelementptr inbounds i8*, i8** %13, i64 1
%15 = load i8*, i8** %14
%16 = call i64 @verify(i8* %15)
%17 = icmp ne i64 %16, 0
br i1 %17, label %18, label %20
18: ; preds = %12
%19 = call i32 (...) @grant_shell()
br label %22
20: ; preds = %12
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([57 x i8], [57 x i8]* @.str.1, i64 0, i64 0))
br label %22
22: ; preds = %20, %18
store i32 0, i32* %3
br label %23
23: ; preds = %22, %8
%24 = load i32, i32* %3
ret i32 %24
}

LLVM IR (-O2):
@.str = [18 x i8] c"Usage: %s passwd\0A\00"
@str = [56 x i8] c"You're not the superuser, you don't know the password!!\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %7, label %4
4: ; preds = %2
%5 = load i8*, i8** %1
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i8* %5)
br label %16
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = tail call i64 @verify(i8* %9)
%11 = icmp eq i64 %10, 0
br i1 %11, label %14, label %12
12: ; preds = %7
%13 = tail call i32 (...) @grant_shell()
br label %16
14: ; preds = %7
%15 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([56 x i8], [56 x i8]* @str, i64 0, i64 0))
br label %16
16: ; preds = %12, %14, %4
%17 = phi i32 [ 1, %4 ], [ 0, %14 ], [ 0, %12 ]
ret i32 %17
}