#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*/ permute(char *, int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, char *);
int /*<<< orphan*/ strlen(char *);
int main() {
  char str[500];
  printf("Enter the string\n");
  scanf("%s", str);
  printf("The string is :: %s\nThe perumtations are :\n", str);
  permute(str, 0, strlen(str));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x210,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xea7(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
lea    -0x200(%rbp),%rsi
lea    0xea4(%rip),%rdi
call   1060 <scanf@plt>
lea    -0x200(%rbp),%rsi
lea    0xe94(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
lea    -0x200(%rbp),%rax
mov    %rax,-0x208(%rbp)
lea    -0x200(%rbp),%rdi
call   1040 <strlen@plt>
mov    -0x208(%rbp),%rdi
mov    %eax,%edx
xor    %esi,%esi
call   1030 <permute@plt>
xor    %eax,%eax
add    $0x210,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x200,%rsp
lea    0xed0(%rip),%rdi
call   1030 <puts@plt>
lea    0xe95(%rip),%rdi
mov    %rsp,%rbx
mov    %rbx,%rsi
call   1070 <scanf@plt>
lea    0xe86(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1060 <printf@plt>
mov    %rbx,%rdi
call   1050 <strlen@plt>
mov    %rbx,%rdi
xor    %esi,%esi
mov    %eax,%edx
call   1040 <permute@plt>
xor    %eax,%eax
add    $0x200,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [18 x i8] c"Enter the string\0A\00"
@.str.1 = [3 x i8] c"%s\00"
@.str.2 = [44 x i8] c"The string is :: %s\0AThe perumtations are :\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [500 x i8]
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%4 = getelementptr inbounds [500 x i8], [500 x i8]* %2, i64 0, i64 0
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %4)
%6 = getelementptr inbounds [500 x i8], [500 x i8]* %2, i64 0, i64 0
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([44 x i8], [44 x i8]* @.str.2, i64 0, i64 0), i8* %6)
%8 = getelementptr inbounds [500 x i8], [500 x i8]* %2, i64 0, i64 0
%9 = getelementptr inbounds [500 x i8], [500 x i8]* %2, i64 0, i64 0
%10 = call i32 @strlen(i8* %9)
%11 = call i32 @permute(i8* %8, i32 0, i32 %10)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%s\00"
@.str.2 = [44 x i8] c"The string is :: %s\0AThe perumtations are :\0A\00"
@str = [17 x i8] c"Enter the string\00"
define i32 @main() {
%1 = alloca [500 x i8]
%2 = getelementptr inbounds [500 x i8], [500 x i8]* %1, i64 0, i64 0
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %2)
%5 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([44 x i8], [44 x i8]* @.str.2, i64 0, i64 0), i8* %2)
%6 = call i32 @strlen(i8* %2)
%7 = call i32 @permute(i8* %2, i32 0, i32 %6)
ret i32 0
}