#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 */
typedef int uint64_t;

/* Variables and functions */
int lcm(int, int);
__attribute__((always_)) uint64_t f() {
  uint64_t n = 2;
  uint64_t i;
  for (i = 3; i < 21; i++)
    n = lcm(n, i);
  return n;
}


x86 assembly (clang, -O0):
<f>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x2,-0x4(%rbp)
movl   $0x3,-0x8(%rbp)
cmpl   $0x15,-0x8(%rbp)
jge    114c <f+0x3c>
mov    -0x4(%rbp),%edi
mov    -0x8(%rbp),%esi
call   1030 <lcm@plt>
mov    %eax,-0x4(%rbp)
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1126 <f+0x16>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<f>:
push   %rax
mov    $0x2,%edi
mov    $0x3,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x4,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x5,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x6,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x7,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x8,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x9,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0xa,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0xb,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0xc,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0xd,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0xe,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0xf,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x10,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x11,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x12,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x13,%esi
call   1030 <lcm@plt>
mov    %eax,%edi
mov    $0x14,%esi
pop    %rax
jmp    1030 <lcm@plt>

LLVM IR (-O0):
define i32 @f() {
%1 = alloca i32
%2 = alloca i32
store i32 2, i32* %1
store i32 3, i32* %2
br label %3
3: ; preds = %10, %0
%4 = load i32, i32* %2
%5 = icmp slt i32 %4, 21
br i1 %5, label %6, label %13
6: ; preds = %3
%7 = load i32, i32* %1
%8 = load i32, i32* %2
%9 = call i32 @lcm(i32 %7, i32 %8)
store i32 %9, i32* %1
br label %10
10: ; preds = %6
%11 = load i32, i32* %2
%12 = add nsw i32 %11, 1
store i32 %12, i32* %2
br label %3
13: ; preds = %3
%14 = load i32, i32* %1
ret i32 %14
}

LLVM IR (-O2):
define i32 @f() {
%1 = tail call i32 @lcm(i32 2, i32 3)
%2 = tail call i32 @lcm(i32 %1, i32 4)
%3 = tail call i32 @lcm(i32 %2, i32 5)
%4 = tail call i32 @lcm(i32 %3, i32 6)
%5 = tail call i32 @lcm(i32 %4, i32 7)
%6 = tail call i32 @lcm(i32 %5, i32 8)
%7 = tail call i32 @lcm(i32 %6, i32 9)
%8 = tail call i32 @lcm(i32 %7, i32 10)
%9 = tail call i32 @lcm(i32 %8, i32 11)
%10 = tail call i32 @lcm(i32 %9, i32 12)
%11 = tail call i32 @lcm(i32 %10, i32 13)
%12 = tail call i32 @lcm(i32 %11, i32 14)
%13 = tail call i32 @lcm(i32 %12, i32 15)
%14 = tail call i32 @lcm(i32 %13, i32 16)
%15 = tail call i32 @lcm(i32 %14, i32 17)
%16 = tail call i32 @lcm(i32 %15, i32 18)
%17 = tail call i32 @lcm(i32 %16, i32 19)
%18 = tail call i32 @lcm(i32 %17, i32 20)
ret i32 %18
}