#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 fib(int, int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main(int argc, char *argv[], char *envp[]) {
  int local0;
  int o0;
  int o4;
  printf("Input number: ");
  scanf("%d", &local0);
  o0 = fib(local0, o4);
  printf("fibonacci(%d) = %d\n", local0, o0);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %rdx,-0x18(%rbp)
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb0(%rip),%rdi
lea    -0x1c(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x1c(%rbp),%edi
mov    -0x24(%rbp),%esi
call   1050 <fib@plt>
mov    %eax,-0x20(%rbp)
mov    -0x1c(%rbp),%esi
mov    -0x20(%rbp),%edx
lea    0xe8f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xec8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xec9(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%edi
call   1050 <fib@plt>
mov    0x4(%rsp),%esi
lea    0xeae(%rip),%rdi
mov    %eax,%edx
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [15 x i8] c"Input number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [20 x i8] c"fibonacci(%d) = %d\0A\00"
define i32 @main(i32 %0, i8** %1, i8** %2) {
%4 = alloca i32
%5 = alloca i32
%6 = alloca i8**
%7 = alloca i8**
%8 = alloca i32
%9 = alloca i32
%10 = alloca i32
store i32 0, i32* %4
store i32 %0, i32* %5
store i8** %1, i8*** %6
store i8** %2, i8*** %7
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%12 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %8)
%13 = load i32, i32* %8
%14 = load i32, i32* %10
%15 = call i32 @fib(i32 %13, i32 %14)
store i32 %15, i32* %9
%16 = load i32, i32* %8
%17 = load i32, i32* %9
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %16, i32 %17)
ret i32 0
}

LLVM IR (-O2):
@.str = [15 x i8] c"Input number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [20 x i8] c"fibonacci(%d) = %d\0A\00"
define i32 @main(i32 %0, i8** nocapture readnone %1, i8** nocapture readnone %2) {
%4 = alloca i32
%5 = bitcast i32* %4 to i8*
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %4)
%8 = load i32, i32* %4
%9 = call i32 @fib(i32 %8, i32 undef)
%10 = load i32, i32* %4
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %10, i32 %9)
ret i32 0
}