#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*/ Cipher(char *, unsigned int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, ...);
int main(int argc, char *argv[]) {
  char *input;
  unsigned offset;
  printf("Please input a string: \n");
  scanf("%s", input);
  printf("Please input an even offset between 0 and 255: \n");
  scanf("%d", &offset);
  Cipher(input, offset);
  printf("After Cipher: %s", input);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x18(%rbp),%rsi
lea    0xf03(%rip),%rdi
mov    $0x0,%al
call   1040 <scanf@plt>
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed6(%rip),%rdi
lea    -0x1c(%rbp),%rsi
mov    $0x0,%al
call   1040 <scanf@plt>
mov    -0x18(%rbp),%rdi
mov    -0x1c(%rbp),%esi
call   1050 <Cipher@plt>
mov    -0x18(%rbp),%rsi
lea    0xeb7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xecc(%rip),%rdi
call   1030 <puts@plt>
lea    0xebd(%rip),%rdi
xor    %eax,%eax
call   1050 <scanf@plt>
lea    0xeca(%rip),%rdi
call   1030 <puts@plt>
lea    0xe92(%rip),%rdi
lea    0x4(%rsp),%rsi
xor    %eax,%eax
call   1050 <scanf@plt>
mov    0x4(%rsp),%esi
call   1060 <Cipher@plt>
lea    0xe79(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [25 x i8] c"Please input a string: \0A\00"
@.str.1 = [3 x i8] c"%s\00"
@.str.2 = [49 x i8] c"Please input an even offset between 0 and 255: \0A\00"
@.str.3 = [3 x i8] c"%d\00"
@.str.4 = [17 x i8] c"After Cipher: %s\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i8**
%5 = alloca i8*
%6 = alloca i32
store i32 %0, i32* %3
store i8** %1, i8*** %4
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
%8 = load i8*, i8** %5
%9 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %8)
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([49 x i8], [49 x i8]* @.str.2, i64 0, i64 0))
%11 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %6)
%12 = load i8*, i8** %5
%13 = load i32, i32* %6
%14 = call i32 @Cipher(i8* %12, i32 %13)
%15 = load i8*, i8** %5
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.4, i64 0, i64 0), i8* %15)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%s\00"
@.str.3 = [3 x i8] c"%d\00"
@.str.4 = [17 x i8] c"After Cipher: %s\00"
@str = [24 x i8] c"Please input a string: \00"
@str.5 = [48 x i8] c"Please input an even offset between 0 and 255: \00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca i32
%4 = bitcast i32* %3 to i8*
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @str, i64 0, i64 0))
%6 = tail call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* undef)
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([48 x i8], [48 x i8]* @str.5, i64 0, i64 0))
%8 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %3)
%9 = load i32, i32* %3
%10 = call i32 @Cipher(i8* undef, i32 %9)
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.4, i64 0, i64 0), i8* undef)
ret i32 0
}