#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 /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int n, a = 1, b = 1, c;
  printf("Enter the number of terms you want to display Fibonacci series: ");
  scanf("%d", &n);
  printf("\n\nFibonacci Series\n");
  for (int i = 0; i < n; i++) {
    printf("%d \t", a);
    c = a + b;
    a = b;
    b = c;
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0xc(%rbp)
movl   $0x1,-0x10(%rbp)
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeef(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xee2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11b0 <main+0x90>
mov    -0xc(%rbp),%esi
lea    0xed2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    -0x10(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0x14(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    1170 <main+0x50>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
lea    0xec2(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xef5(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
lea    0xeec(%rip),%rdi
call   1030 <puts@plt>
cmpl   $0x0,0x4(%rsp)
jle    11a0 <main+0x70>
mov    $0x1,%ebp
lea    0xecf(%rip),%r14
xor    %ebx,%ebx
mov    $0x1,%r15d
nopl   (%rax)
mov    %r14,%rdi
mov    %ebp,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %ebp,%eax
add    %r15d,%eax
add    $0x1,%ebx
mov    %r15d,%ebp
mov    %eax,%r15d
cmp    0x4(%rsp),%ebx
jl     1180 <main+0x50>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [65 x i8] c"Enter the number of terms you want to display Fibonacci series: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [20 x i8] c"\0A\0AFibonacci Series\0A\00"
@.str.3 = [5 x i8] c"%d \09\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
%6 = alloca i32
store i32 0, i32* %1
store i32 1, i32* %3
store i32 1, i32* %4
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0))
store i32 0, i32* %6
br label %10
10: ; preds = %22, %0
%11 = load i32, i32* %6
%12 = load i32, i32* %2
%13 = icmp slt i32 %11, %12
br i1 %13, label %14, label %25
14: ; preds = %10
%15 = load i32, i32* %3
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0), i32 %15)
%17 = load i32, i32* %3
%18 = load i32, i32* %4
%19 = add nsw i32 %17, %18
store i32 %19, i32* %5
%20 = load i32, i32* %4
store i32 %20, i32* %3
%21 = load i32, i32* %5
store i32 %21, i32* %4
br label %22
22: ; preds = %14
%23 = load i32, i32* %6
%24 = add nsw i32 %23, 1
store i32 %24, i32* %6
br label %10
25: ; preds = %10
ret i32 0
}

LLVM IR (-O2):
@.str = [65 x i8] c"Enter the number of terms you want to display Fibonacci series: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.3 = [5 x i8] c"%d \09\00"
@str = [19 x i8] c"\0A\0AFibonacci Series\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([65 x i8], [65 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), i32* %1)
%5 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @str, i64 0, i64 0))
%6 = load i32, i32* %1
%7 = icmp sgt i32 %6, 0
br i1 %7, label %9, label %8
8: ; preds = %9, %0
ret i32 0
9: ; preds = %0, %9
%10 = phi i32 [ %15, %9 ], [ 0, %0 ]
%11 = phi i32 [ %12, %9 ], [ 1, %0 ]
%12 = phi i32 [ %14, %9 ], [ 1, %0 ]
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0), i32 %11)
%14 = add nsw i32 %11, %12
%15 = add nuw nsw i32 %10, 1
%16 = load i32, i32* %1
%17 = icmp slt i32 %15, %16
br i1 %17, label %9, label %8
}