#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*/ decode_password(char *, char *);
int /*<<< orphan*/ printf(char *, char *);
int main(int argc, char *argv[]) {
  if (argc != 2) {
    printf("usage: %s encrypted_password\n", argv[0]);
    return 1;
  } else {
    char cleartext[512] = {0};
    decode_password(argv[1], cleartext);
    printf("%s\n", cleartext);
    return 0;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x210,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
je     1172 <main+0x42>
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
lea    0xe9f(%rip),%rdi
call   1030 <printf@plt>
movl   $0x1,-0x4(%rbp)
jmp    11b3 <main+0x83>
lea    -0x210(%rbp),%rdi
xor    %esi,%esi
mov    $0x200,%edx
call   1040 <memset@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
lea    -0x210(%rbp),%rsi
call   1050 <decode_password@plt>
lea    -0x210(%rbp),%rsi
lea    0xe77(%rip),%rdi
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x210,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
sub    $0x200,%rsp
mov    %rsi,%rbx
cmp    $0x2,%edi
jne    1174 <main+0x44>
mov    %rsp,%r14
xor    %ebp,%ebp
mov    $0x200,%edx
mov    %r14,%rdi
xor    %esi,%esi
call   1040 <memset@plt>
mov    0x8(%rbx),%rdi
mov    %r14,%rsi
call   1050 <decode_password@plt>
lea    0xeb4(%rip),%rdi
mov    %r14,%rsi
call   1030 <printf@plt>
jmp    1188 <main+0x58>
mov    (%rbx),%rsi
lea    0xe82(%rip),%rdi
call   1030 <printf@plt>
mov    $0x1,%ebp
mov    %ebp,%eax
add    $0x200,%rsp
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [30 x i8] c"usage: %s encrypted_password\0A\00"
@.str.1 = [4 x i8] c"%s\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca [512 x i8]
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 2
br i1 %8, label %9, label %14
9: ; preds = %2
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0), i8* %12)
store i32 1, i32* %3
br label %23
14: ; preds = %2
%15 = bitcast [512 x i8]* %6 to i8*
%16 = load i8**, i8*** %5
%17 = getelementptr inbounds i8*, i8** %16, i64 1
%18 = load i8*, i8** %17
%19 = getelementptr inbounds [512 x i8], [512 x i8]* %6, i64 0, i64 0
%20 = call i32 @decode_password(i8* %18, i8* %19)
%21 = getelementptr inbounds [512 x i8], [512 x i8]* %6, i64 0, i64 0
%22 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %21)
store i32 0, i32* %3
br label %23
23: ; preds = %14, %9
%24 = load i32, i32* %3
ret i32 %24
}

LLVM IR (-O2):
@.str = [30 x i8] c"usage: %s encrypted_password\0A\00"
@.str.1 = [4 x i8] c"%s\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = alloca [512 x i8]
%4 = icmp eq i32 %0, 2
br i1 %4, label %8, label %5
5: ; preds = %2
%6 = load i8*, i8** %1
%7 = tail call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0), i8* %6)
br label %14
8: ; preds = %2
%9 = getelementptr inbounds [512 x i8], [512 x i8]* %3, i64 0, i64 0
%10 = getelementptr inbounds i8*, i8** %1, i64 1
%11 = load i8*, i8** %10
%12 = call i32 @decode_password(i8* %11, i8* %9)
%13 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %9)
br label %14
14: ; preds = %8, %5
%15 = phi i32 [ 1, %5 ], [ 0, %8 ]
ret i32 %15
}