#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 num;
  printf("please input a num:\n");
  scanf("%d", &num);
  if (num % 7 == 0 || num % 3 == 0)
    printf("num(%d) can divide by 7 or 3 !", num);
  else
    printf("num(%d) can not divide by  7 or 3 !", num);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed1(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    $0x7,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
je     1175 <main+0x55>
mov    -0x8(%rbp),%eax
mov    $0x3,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    118b <main+0x6b>
mov    -0x8(%rbp),%esi
lea    0xe99(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    119c <main+0x7c>
mov    -0x8(%rbp),%esi
lea    0xea2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xf0e(%rip),%rdi
call   1030 <puts@plt>
lea    0xebc(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
mov    0x4(%rsp),%esi
imul   $0xb6db6db7,%esi,%eax
add    $0x12492492,%eax
imul   $0xaaaaaaab,%esi,%ecx
add    $0x2aaaaaaa,%ecx
cmp    $0x55555555,%ecx
lea    0xe8d(%rip),%rcx
lea    0xea5(%rip),%rdi
cmovb  %rcx,%rdi
cmp    $0x24924925,%eax
cmovb  %rcx,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [21 x i8] c"please input a num:\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [31 x i8] c"num(%d) can divide by 7 or 3 !\00"
@.str.3 = [36 x i8] c"num(%d) can not divide by 7 or 3 !\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 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* %2)
%5 = load i32, i32* %2
%6 = srem i32 %5, 7
%7 = icmp eq i32 %6, 0
br i1 %7, label %12, label %8
8: ; preds = %0
%9 = load i32, i32* %2
%10 = srem i32 %9, 3
%11 = icmp eq i32 %10, 0
br i1 %11, label %12, label %15
12: ; preds = %8, %0
%13 = load i32, i32* %2
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.2, i64 0, i64 0), i32 %13)
br label %18
15: ; preds = %8
%16 = load i32, i32* %2
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.3, i64 0, i64 0), i32 %16)
br label %18
18: ; preds = %15, %12
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [31 x i8] c"num(%d) can divide by 7 or 3 !\00"
@.str.3 = [36 x i8] c"num(%d) can not divide by 7 or 3 !\00"
@str = [20 x i8] c"please input a num:\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 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 = srem i32 %5, 7
%7 = icmp eq i32 %6, 0
%8 = srem i32 %5, 3
%9 = icmp eq i32 %8, 0
%10 = or i1 %7, %9
%11 = select i1 %10, i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.3, i64 0, i64 0)
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) %11, i32 %5)
ret i32 0
}