#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 main() {
  int count, b, ris = 0;
  int a;
  a = 1;
  printf("Welcome to Fibonacci (A simple C program to calculate Fibonacci "
         "sequences)\n");
  printf("\n");
  while (count < 20) {
    ris = a + b;
    b = a;
    a = ris;
    printf(" %d \t", ris);
    count = count + 1;
    ris = 0;
  }
  printf("\a");
  printf("\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x10(%rbp)
movl   $0x1,-0x14(%rbp)
lea    0xecc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf08(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
cmpl   $0x14,-0x8(%rbp)
jge    118e <main+0x7e>
mov    -0x14(%rbp),%eax
add    -0xc(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0x14(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0x10(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%esi
lea    0xeda(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
movl   $0x0,-0x10(%rbp)
jmp    1149 <main+0x39>
lea    0xebd(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xea7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed8(%rip),%rdi
call   1040 <puts@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    $0x7,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [76 x i8] c"Welcome to Fibonacci (A simple C program to calculate Fibonacci sequences)\0A\00"
@.str.1 = [2 x i8] c"\0A\00"
@.str.2 = [6 x i8] c" %d \09\00"
@.str.3 = [2 x i8] c"\07\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 0, i32* %4
store i32 1, i32* %5
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([76 x i8], [76 x i8]* @.str, i64 0, i64 0))
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
br label %8
8: ; preds = %11, %0
%9 = load i32, i32* %2
%10 = icmp slt i32 %9, 20
br i1 %10, label %11, label %21
11: ; preds = %8
%12 = load i32, i32* %5
%13 = load i32, i32* %3
%14 = add nsw i32 %12, %13
store i32 %14, i32* %4
%15 = load i32, i32* %5
store i32 %15, i32* %3
%16 = load i32, i32* %4
store i32 %16, i32* %5
%17 = load i32, i32* %4
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %17)
%19 = load i32, i32* %2
%20 = add nsw i32 %19, 1
store i32 %20, i32* %2
store i32 0, i32* %4
br label %8
21: ; preds = %8
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@str = [75 x i8] c"Welcome to Fibonacci (A simple C program to calculate Fibonacci sequences)\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([75 x i8], [75 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @putchar(i32 10)
%3 = tail call i32 @putchar(i32 7)
%4 = tail call i32 @putchar(i32 10)
ret i32 0
}