#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 *, long);
int main() {
  long int n, p1, p2, sum = 0;
  p1 = 1;
  p2 = 2;
  sum += p2;
  while ((n = p1 + p2) < 4000000L) {
    if (!(n % 2))
      sum += n;
    p1 = p2;
    p2 = n;
  }
  printf("\nSum is %d", sum);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
movq   $0x0,-0x28(%rbp)
movq   $0x1,-0x18(%rbp)
movq   $0x2,-0x20(%rbp)
mov    -0x20(%rbp),%rax
add    -0x28(%rbp),%rax
mov    %rax,-0x28(%rbp)
mov    -0x18(%rbp),%rax
add    -0x20(%rbp),%rax
mov    %rax,-0x10(%rbp)
cmp    $0x3d0900,%rax
jge    1194 <main+0x84>
mov    -0x10(%rbp),%rax
mov    $0x2,%ecx
cqto
idiv   %rcx
cmp    $0x0,%rdx
jne    117f <main+0x6f>
mov    -0x10(%rbp),%rax
add    -0x28(%rbp),%rax
mov    %rax,-0x28(%rbp)
mov    -0x20(%rbp),%rax
mov    %rax,-0x18(%rbp)
mov    -0x10(%rbp),%rax
mov    %rax,-0x20(%rbp)
jmp    1143 <main+0x33>
mov    -0x28(%rbp),%rsi
lea    0xe61(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
mov    $0x2,%esi
mov    $0x3,%ecx
mov    $0x2,%eax
nop
mov    %rcx,%rdx
test   $0x1,%dl
mov    $0x0,%ecx
cmove  %rdx,%rcx
add    %rcx,%rsi
add    %rdx,%rax
mov    %rax,%rcx
cmp    $0x3d0900,%rax
mov    %rdx,%rax
jl     1120 <main+0x10>
push   %rax
lea    0xeb5(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [11 x i8] c"\0ASum is %d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i64
%3 = alloca i64
%4 = alloca i64
%5 = alloca i64
store i32 0, i32* %1
store i64 0, i64* %5
store i64 1, i64* %3
store i64 2, i64* %4
%6 = load i64, i64* %4
%7 = load i64, i64* %5
%8 = add nsw i64 %7, %6
store i64 %8, i64* %5
br label %9
9: ; preds = %22, %0
%10 = load i64, i64* %3
%11 = load i64, i64* %4
%12 = add nsw i64 %10, %11
store i64 %12, i64* %2
%13 = icmp slt i64 %12, 4000000
br i1 %13, label %14, label %25
14: ; preds = %9
%15 = load i64, i64* %2
%16 = srem i64 %15, 2
%17 = icmp ne i64 %16, 0
br i1 %17, label %22, label %18
18: ; preds = %14
%19 = load i64, i64* %2
%20 = load i64, i64* %5
%21 = add nsw i64 %20, %19
store i64 %21, i64* %5
br label %22
22: ; preds = %18, %14
%23 = load i64, i64* %4
store i64 %23, i64* %3
%24 = load i64, i64* %2
store i64 %24, i64* %4
br label %9
25: ; preds = %9
%26 = load i64, i64* %5
%27 = call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i64 %26)
ret i32 0
}

LLVM IR (-O2):
@.str = [11 x i8] c"\0ASum is %d\00"
define i32 @main() {
br label %1
1: ; preds = %0, %1
%2 = phi i64 [ 3, %0 ], [ %9, %1 ]
%3 = phi i64 [ 2, %0 ], [ %8, %1 ]
%4 = phi i64 [ 2, %0 ], [ %2, %1 ]
%5 = and i64 %2, 1
%6 = icmp eq i64 %5, 0
%7 = select i1 %6, i64 %2, i64 0
%8 = add nsw i64 %7, %3
%9 = add nsw i64 %2, %4
%10 = icmp slt i64 %9, 4000000
br i1 %10, label %1, label %11
11: ; preds = %1
%12 = tail call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i64 %8)
ret i32 0
}