#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() {
  int limitNumber, a, b, c;
  a = 2;
  b = 1;
  printf("Enter the limit of Lucas number: ");
  scanf("%d", &limitNumber);
  while (limitNumber >= a) {
    printf("%d, \n", 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   $0x2,-0xc(%rbp)
movl   $0x1,-0x10(%rbp)
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed0(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jl     1192 <main+0x72>
mov    -0xc(%rbp),%esi
lea    0xeb4(%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)
jmp    115b <main+0x3b>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xee5(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1040 <scanf@plt>
cmpl   $0x2,0xc(%rsp)
jl     117a <main+0x5a>
mov    $0x1,%ebp
mov    $0x2,%ebx
lea    0xec6(%rip),%r14
nop
mov    %r14,%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %ebx,%eax
add    %ebp,%eax
mov    %ebp,%ebx
cmp    %ebp,0xc(%rsp)
mov    %eax,%ebp
jge    1160 <main+0x40>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [34 x i8] c"Enter the limit of Lucas number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [6 x i8] c"%d, \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
store i32 2, i32* %3
store i32 1, i32* %4
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 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* %2)
br label %8
8: ; preds = %12, %0
%9 = load i32, i32* %2
%10 = load i32, i32* %3
%11 = icmp sge i32 %9, %10
br i1 %11, label %12, label %20
12: ; preds = %8
%13 = load i32, i32* %3
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %13)
%15 = load i32, i32* %3
%16 = load i32, i32* %4
%17 = add nsw i32 %15, %16
store i32 %17, i32* %5
%18 = load i32, i32* %4
store i32 %18, i32* %3
%19 = load i32, i32* %5
store i32 %19, i32* %4
br label %8
20: ; preds = %8
ret i32 0
}

LLVM IR (-O2):
@.str = [34 x i8] c"Enter the limit of Lucas number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [6 x i8] c"%d, \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 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 = load i32, i32* %1
%6 = icmp slt i32 %5, 2
br i1 %6, label %14, label %7
7: ; preds = %0, %7
%8 = phi i32 [ %9, %7 ], [ 2, %0 ]
%9 = phi i32 [ %11, %7 ], [ 1, %0 ]
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %8)
%11 = add nsw i32 %8, %9
%12 = load i32, i32* %1
%13 = icmp slt i32 %12, %9
br i1 %13, label %14, label %7
14: ; preds = %7, %0
ret i32 0
}