#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, int);
int main() {
  int number;
  int total = 0;
  for (number = 1; number < 1000; number++) {
    if (number % 3 == 0 || number % 5 == 0)
      total += number;
  }
  printf("\n\nThe sum of all natural numbers divisible by 3 or 5 from 1-%d is: "
         "%d\n\n",
         1000, total);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0xc(%rbp)
movl   $0x1,-0x8(%rbp)
cmpl   $0x3e8,-0x8(%rbp)
jge    117e <main+0x6e>
mov    -0x8(%rbp),%eax
mov    $0x3,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
je     1162 <main+0x52>
mov    -0x8(%rbp),%eax
mov    $0x5,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    116b <main+0x5b>
mov    -0x8(%rbp),%eax
add    -0xc(%rbp),%eax
mov    %eax,-0xc(%rbp)
jmp    1170 <main+0x60>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    112d <main+0x1d>
mov    -0xc(%rbp),%edx
lea    0xe78(%rip),%rdi
mov    $0x3e8,%esi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
movdqa 0xee6(%rip),%xmm8
movdqa 0xeee(%rip),%xmm1
pxor   %xmm2,%xmm2
mov    $0x3e0,%eax
movdqa 0xf0c(%rip),%xmm15
movdqa 0xf13(%rip),%xmm10
movdqa 0xf1a(%rip),%xmm11
movdqa 0xf22(%rip),%xmm3
movdqa 0xf29(%rip),%xmm12
movdqa 0xf30(%rip),%xmm13
movdqa 0xf37(%rip),%xmm14
pxor   %xmm6,%xmm6
pxor   %xmm4,%xmm4
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
movdqa %xmm8,%xmm0
pmullw 0xea3(%rip),%xmm0
movdqa %xmm0,%xmm5
psubusw %xmm15,%xmm5
pcmpeqw %xmm2,%xmm5
movdqa %xmm8,%xmm7
pmullw %xmm11,%xmm7
movdqa %xmm7,%xmm9
psubusw %xmm3,%xmm9
pcmpeqw %xmm2,%xmm9
por    %xmm5,%xmm9
paddw  %xmm10,%xmm0
psubusw %xmm15,%xmm0
pcmpeqw %xmm2,%xmm0
paddw  %xmm12,%xmm7
psubusw %xmm3,%xmm7
pcmpeqw %xmm2,%xmm7
por    %xmm0,%xmm7
movdqa %xmm1,%xmm0
paddd  0xe3d(%rip),%xmm0
punpcklwd %xmm7,%xmm5
psrad  $0x10,%xmm5
pand   %xmm0,%xmm5
paddd  %xmm5,%xmm4
punpcklwd %xmm9,%xmm0
psrad  $0x10,%xmm0
pand   %xmm1,%xmm0
paddd  %xmm0,%xmm6
paddd  %xmm13,%xmm1
paddw  %xmm14,%xmm8
add    $0xfffffff8,%eax
jne    1180 <main+0x70>
paddd  %xmm6,%xmm4
pshufd $0xee,%xmm4,%xmm0
paddd  %xmm4,%xmm0
pshufd $0x55,%xmm0,%xmm1
paddd  %xmm0,%xmm1
movd   %xmm1,%edx
add    $0xf8f,%edx
lea    0xe70(%rip),%rdi
mov    $0x3e8,%esi
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [72 x i8] c"\0A\0AThe sum of all natural numbers divisible by 3 or 5 from 1-%d is: %d\0A\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %3
store i32 1, i32* %2
br label %4
4: ; preds = %20, %0
%5 = load i32, i32* %2
%6 = icmp slt i32 %5, 1000
br i1 %6, label %7, label %23
7: ; preds = %4
%8 = load i32, i32* %2
%9 = srem i32 %8, 3
%10 = icmp eq i32 %9, 0
br i1 %10, label %15, label %11
11: ; preds = %7
%12 = load i32, i32* %2
%13 = srem i32 %12, 5
%14 = icmp eq i32 %13, 0
br i1 %14, label %15, label %19
15: ; preds = %11, %7
%16 = load i32, i32* %2
%17 = load i32, i32* %3
%18 = add nsw i32 %17, %16
store i32 %18, i32* %3
br label %19
19: ; preds = %15, %11
br label %20
20: ; preds = %19
%21 = load i32, i32* %2
%22 = add nsw i32 %21, 1
store i32 %22, i32* %2
br label %4
23: ; preds = %4
%24 = load i32, i32* %3
%25 = call i32 @printf(i8* getelementptr inbounds ([72 x i8], [72 x i8]* @.str, i64 0, i64 0), i32 1000, i32 %24)
ret i32 0
}

LLVM IR (-O2):
@.str = [72 x i8] c"\0A\0AThe sum of all natural numbers divisible by 3 or 5 from 1-%d is: %d\0A\0A\00"
define i32 @main() {
br label %1
1: ; preds = %1, %0
%2 = phi i32 [ 0, %0 ], [ %23, %1 ]
%3 = phi <4 x i32> [ zeroinitializer, %0 ], [ %21, %1 ]
%4 = phi <4 x i32> [ zeroinitializer, %0 ], [ %22, %1 ]
%5 = phi <4 x i32> [ <i32 1, i32 2, i32 3, i32 4>, %0 ], [ %24, %1 ]
%6 = phi <4 x i16> [ <i16 1, i16 2, i16 3, i16 4>, %0 ], [ %25, %1 ]
%7 = add <4 x i32> %5, <i32 4, i32 4, i32 4, i32 4>
%8 = add <4 x i16> %6, <i16 4, i16 4, i16 4, i16 4>
%9 = urem <4 x i16> %6, <i16 3, i16 3, i16 3, i16 3>
%10 = urem <4 x i16> %8, <i16 3, i16 3, i16 3, i16 3>
%11 = icmp eq <4 x i16> %9, zeroinitializer
%12 = icmp eq <4 x i16> %10, zeroinitializer
%13 = urem <4 x i16> %6, <i16 5, i16 5, i16 5, i16 5>
%14 = urem <4 x i16> %8, <i16 5, i16 5, i16 5, i16 5>
%15 = icmp eq <4 x i16> %13, zeroinitializer
%16 = icmp eq <4 x i16> %14, zeroinitializer
%17 = or <4 x i1> %11, %15
%18 = or <4 x i1> %12, %16
%19 = select <4 x i1> %17, <4 x i32> %5, <4 x i32> zeroinitializer
%20 = select <4 x i1> %18, <4 x i32> %7, <4 x i32> zeroinitializer
%21 = add <4 x i32> %19, %3
%22 = add <4 x i32> %20, %4
%23 = add nuw i32 %2, 8
%24 = add <4 x i32> %5, <i32 8, i32 8, i32 8, i32 8>
%25 = add <4 x i16> %6, <i16 8, i16 8, i16 8, i16 8>
%26 = icmp eq i32 %23, 992
br i1 %26, label %27, label %1
27: ; preds = %1
%28 = add <4 x i32> %22, %21
%29 = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> %28)
%30 = add nuw nsw i32 %29, 3983
%31 = tail call i32 @printf(i8* getelementptr inbounds ([72 x i8], [72 x i8]* @.str, i64 0, i64 0), i32 1000, i32 %30)
ret i32 0
}