#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 atoi(char *);
char *decrypt(int, char *);
char *encrypt(int, char *);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char **argv) {
  if (argc != 3) {
    printf("usage: ./caesar <shift> <string>\n");
    return 1;
  }
  int shift = atoi(argv[1]);
  char *string = argv[2];
  printf("encrypted: %s\n", encrypt(shift, string));
  printf("decrypted: %s\n", decrypt(shift, string));
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x3,-0x8(%rbp)
je     117a <main+0x3a>
lea    0xe99(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x1,-0x4(%rbp)
jmp    11d0 <main+0x90>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rax
mov    %rax,-0x20(%rbp)
mov    -0x14(%rbp),%edi
mov    -0x20(%rbp),%rsi
call   1050 <encrypt@plt>
mov    %rax,%rsi
lea    0xe76(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x14(%rbp),%edi
mov    -0x20(%rbp),%rsi
call   1030 <decrypt@plt>
mov    %rax,%rsi
lea    0xe68(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
cmp    $0x3,%edi
jne    11a5 <main+0x55>
mov    %rsi,%rbx
mov    0x8(%rsi),%rdi
call   1070 <atoi@plt>
mov    %eax,%ebp
mov    0x10(%rbx),%r14
mov    %eax,%edi
mov    %r14,%rsi
call   1060 <encrypt@plt>
lea    0xe84(%rip),%rdi
xor    %ebx,%ebx
mov    %rax,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %ebp,%edi
mov    %r14,%rsi
call   1030 <decrypt@plt>
lea    0xe76(%rip),%rdi
mov    %rax,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
jmp    11b6 <main+0x66>
lea    0xe72(%rip),%rdi
call   1040 <puts@plt>
mov    $0x1,%ebx
mov    %ebx,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [34 x i8] c"usage: ./caesar <shift> <string>\0A\00"
@.str.1 = [15 x i8] c"encrypted: %s\0A\00"
@.str.2 = [15 x i8] c"decrypted: %s\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i8*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp ne i32 %8, 3
br i1 %9, label %10, label %12
10: ; preds = %2
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str, i64 0, i64 0))
store i32 1, i32* %3
br label %28
12: ; preds = %2
%13 = load i8**, i8*** %5
%14 = getelementptr inbounds i8*, i8** %13, i64 1
%15 = load i8*, i8** %14
%16 = call i32 @atoi(i8* %15)
store i32 %16, i32* %6
%17 = load i8**, i8*** %5
%18 = getelementptr inbounds i8*, i8** %17, i64 2
%19 = load i8*, i8** %18
store i8* %19, i8** %7
%20 = load i32, i32* %6
%21 = load i8*, i8** %7
%22 = call i8* @encrypt(i32 %20, i8* %21)
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i8* %22)
%24 = load i32, i32* %6
%25 = load i8*, i8** %7
%26 = call i8* @decrypt(i32 %24, i8* %25)
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i8* %26)
br label %28
28: ; preds = %12, %10
%29 = load i32, i32* %3
ret i32 %29
}

LLVM IR (-O2):
@.str.1 = [15 x i8] c"encrypted: %s\0A\00"
@.str.2 = [15 x i8] c"decrypted: %s\0A\00"
@str = [33 x i8] c"usage: ./caesar <shift> <string>\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 3
br i1 %3, label %6, label %4
4: ; preds = %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([33 x i8], [33 x i8]* @str, i64 0, i64 0))
br label %16
6: ; preds = %2
%7 = getelementptr inbounds i8*, i8** %1, i64 1
%8 = load i8*, i8** %7
%9 = tail call i32 @atoi(i8* %8)
%10 = getelementptr inbounds i8*, i8** %1, i64 2
%11 = load i8*, i8** %10
%12 = tail call i8* @encrypt(i32 %9, i8* %11)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i8* %12)
%14 = tail call i8* @decrypt(i32 %9, i8* %11)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i8* %14)
br label %16
16: ; preds = %6, %4
%17 = phi i32 [ 1, %4 ], [ 0, %6 ]
ret i32 %17
}