#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*/ printf(char *, int, int, int);
void hanoi(int n, int start, int focus, int temp) {
  if (0 == n) {
    return;
  } else {
    hanoi(n - 1, start, temp, focus);
    printf("%d.%d->%d\n", n, start, focus);
    hanoi(n - 1, temp, focus, start);
  }
}


x86 assembly (clang, -O0):
<hanoi>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
mov    %esi,-0x8(%rbp)
mov    %edx,-0xc(%rbp)
mov    %ecx,-0x10(%rbp)
xor    %eax,%eax
cmp    -0x4(%rbp),%eax
jne    1144 <hanoi+0x24>
jmp    1181 <hanoi+0x61>
mov    -0x4(%rbp),%edi
sub    $0x1,%edi
mov    -0x8(%rbp),%esi
mov    -0x10(%rbp),%edx
mov    -0xc(%rbp),%ecx
call   1040 <hanoi@plt>
mov    -0x4(%rbp),%esi
mov    -0x8(%rbp),%edx
mov    -0xc(%rbp),%ecx
lea    0xe98(%rip),%rdi
call   1030 <printf@plt>
mov    -0x4(%rbp),%edi
sub    $0x1,%edi
mov    -0x10(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
call   1040 <hanoi@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<hanoi>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
test   %edi,%edi
je     116b <hanoi+0x4b>
mov    %edx,%r14d
mov    %esi,%ebp
mov    %edi,%ebx
lea    0xec6(%rip),%r15
nopw   0x0(%rax,%rax,1)
mov    %ecx,%r12d
lea    -0x1(%rbx),%edi
mov    %ebp,%esi
mov    %ecx,%edx
mov    %r14d,%ecx
call   1040 <hanoi@plt>
mov    %r15,%rdi
mov    %ebx,%esi
mov    %ebp,%edx
mov    %r14d,%ecx
call   1030 <printf@plt>
mov    %ebp,%ecx
mov    %r12d,%ebp
add    $0xffffffff,%ebx
jne    1140 <hanoi+0x20>
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [11 x i8] c"%d.%d->%d\0A\00"
define void @hanoi(i32 %0, i32 %1, i32 %2, i32 %3) {
%5 = alloca i32
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
store i32 %0, i32* %5
store i32 %1, i32* %6
store i32 %2, i32* %7
store i32 %3, i32* %8
%9 = load i32, i32* %5
%10 = icmp eq i32 0, %9
br i1 %10, label %11, label %12
11: ; preds = %4
br label %27
12: ; preds = %4
%13 = load i32, i32* %5
%14 = sub nsw i32 %13, 1
%15 = load i32, i32* %6
%16 = load i32, i32* %8
%17 = load i32, i32* %7
%18 = load i32, i32* %5
%19 = load i32, i32* %6
%20 = load i32, i32* %7
%21 = call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 %18, i32 %19, i32 %20)
%22 = load i32, i32* %5
%23 = sub nsw i32 %22, 1
%24 = load i32, i32* %8
%25 = load i32, i32* %7
%26 = load i32, i32* %6
br label %27
27: ; preds = %11, %12
ret void
}

LLVM IR (-O2):
@.str = [11 x i8] c"%d.%d->%d\0A\00"
define void @hanoi(i32 %0, i32 %1, i32 %2, i32 %3) {
%5 = icmp eq i32 %0, 0
br i1 %5, label %13, label %6
6: ; preds = %4, %6
%7 = phi i32 [ %8, %6 ], [ %3, %4 ]
%8 = phi i32 [ %7, %6 ], [ %1, %4 ]
%9 = phi i32 [ %10, %6 ], [ %0, %4 ]
%10 = add nsw i32 %9, -1
tail call void @hanoi(i32 %10, i32 %8, i32 %7, i32 %2)
%11 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 %9, i32 %8, i32 %2)
%12 = icmp eq i32 %10, 0
br i1 %12, label %13, label %6
13: ; preds = %6, %4
ret void
}