#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 */
scalar_t__ is_multiple_of_three(int);
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ scanf(char *, int *);
int main(int argc, char **argv) {
  printf("Enter a number to test is it multiple of 3: ");
  int n = 0;
  scanf("%d", &n);
  printf(is_multiple_of_three(n) ? "true\n" : "false\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xeb3(%rip),%rdi
call   1030 <printf@plt>
movl   $0x0,-0x14(%rbp)
lea    0xecd(%rip),%rdi
lea    -0x14(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x14(%rbp),%edi
call   1050 <is_multiple_of_three@plt>
mov    %rax,%rcx
lea    0xebb(%rip),%rdi
lea    0xeae(%rip),%rax
cmp    $0x0,%rcx
cmovne %rax,%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xec8(%rip),%rdi
call   1030 <printf@plt>
movl   $0x0,0x4(%rsp)
lea    0xee1(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%edi
call   1050 <is_multiple_of_three@plt>
test   %rax,%rax
lea    0xecd(%rip),%rax
lea    0xec0(%rip),%rdi
cmove  %rax,%rdi
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [45 x i8] c"Enter a number to test is it multiple of 3: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [6 x i8] c"true\0A\00"
@.str.3 = [7 x i8] c"false\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = call i32 @printf(i8* getelementptr inbounds ([45 x i8], [45 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %6
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %6)
%9 = load i32, i32* %6
%10 = call i64 @is_multiple_of_three(i32 %9)
%11 = icmp ne i64 %10, 0
%12 = zext i1 %11 to i64
%13 = select i1 %11, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0)
%14 = call i32 @printf(i8* %13)
ret i32 0
}

LLVM IR (-O2):
@.str = [45 x i8] c"Enter a number to test is it multiple of 3: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [6 x i8] c"true\0A\00"
@.str.3 = [7 x i8] c"false\0A\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca i32
%4 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([45 x i8], [45 x i8]* @.str, i64 0, i64 0))
%5 = bitcast i32* %3 to i8*
store i32 0, i32* %3
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%7 = load i32, i32* %3
%8 = call i64 @is_multiple_of_three(i32 %7)
%9 = icmp eq i64 %8, 0
%10 = select i1 %9, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0)
%11 = call i32 @printf(i8* dereferenceable(1) %10)
ret i32 0
}