#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 age;
  printf("Please enter your age: ");
  scanf("%d", &age);
  if (age < 0) {
    printf("That's probably not a real age.\n");
  } else if (age < 18) {
    printf("You are still a child.\n");
  } else if (age == 18) {
    printf("You are now an adult.\n");
  } else {
    printf("You have been an adult for a while.\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
call   1030 <printf@plt>
lea    0xed6(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
cmpl   $0x0,-0x8(%rbp)
jge    1166 <main+0x46>
lea    0xebf(%rip),%rdi
call   1030 <printf@plt>
jmp    11b2 <main+0x92>
cmpl   $0x12,-0x8(%rbp)
jge    1181 <main+0x61>
lea    0xec5(%rip),%rdi
call   1030 <printf@plt>
jmp    11ad <main+0x8d>
cmpl   $0x12,-0x8(%rbp)
jne    119c <main+0x7c>
lea    0xec2(%rip),%rdi
call   1030 <printf@plt>
jmp    11a8 <main+0x88>
lea    0xec8(%rip),%rdi
call   1030 <printf@plt>
jmp    11ad <main+0x8d>
jmp    11b2 <main+0x92>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xec8(%rip),%rdi
call   1040 <printf@plt>
lea    0xed4(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
mov    0x4(%rsp),%eax
test   %eax,%eax
js     1164 <main+0x34>
cmp    $0x12,%eax
jae    116d <main+0x3d>
lea    0xef3(%rip),%rdi
jmp    117f <main+0x4f>
lea    0xf01(%rip),%rdi
jmp    117f <main+0x4f>
lea    0xecb(%rip),%rax
lea    0xea0(%rip),%rdi
cmove  %rax,%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [24 x i8] c"Please enter your age: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [33 x i8] c"That's probably not a real age.\0A\00"
@.str.3 = [24 x i8] c"You are still a child.\0A\00"
@.str.4 = [23 x i8] c"You are now an adult.\0A\00"
@.str.5 = [37 x i8] c"You have been an adult for a while.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 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 = icmp slt i32 %5, 0
br i1 %6, label %7, label %9
7: ; preds = %0
%8 = call i32 @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str.2, i64 0, i64 0))
br label %23
9: ; preds = %0
%10 = load i32, i32* %2
%11 = icmp slt i32 %10, 18
br i1 %11, label %12, label %14
12: ; preds = %9
%13 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.3, i64 0, i64 0))
br label %22
14: ; preds = %9
%15 = load i32, i32* %2
%16 = icmp eq i32 %15, 18
br i1 %16, label %17, label %19
17: ; preds = %14
%18 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.4, i64 0, i64 0))
br label %21
19: ; preds = %14
%20 = call i32 @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str.5, i64 0, i64 0))
br label %21
21: ; preds = %19, %17
br label %22
22: ; preds = %21, %12
br label %23
23: ; preds = %22, %7
ret i32 0
}

LLVM IR (-O2):
@.str = [24 x i8] c"Please enter your age: \00"
@.str.1 = [3 x i8] c"%d\00"
@str = [36 x i8] c"You have been an adult for a while.\00"
@str.6 = [22 x i8] c"You are now an adult.\00"
@str.7 = [23 x i8] c"You are still a child.\00"
@str.8 = [32 x i8] c"That's probably not a real age.\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 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 = icmp slt i32 %5, 0
br i1 %6, label %12, label %7
7: ; preds = %0
%8 = icmp ult i32 %5, 18
br i1 %8, label %12, label %9
9: ; preds = %7
%10 = icmp eq i32 %5, 18
%11 = select i1 %10, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @str.6, i64 0, i64 0), i8* getelementptr inbounds ([36 x i8], [36 x i8]* @str, i64 0, i64 0)
br label %12
12: ; preds = %9, %7, %0
%13 = phi i8* [ getelementptr inbounds ([32 x i8], [32 x i8]* @str.8, i64 0, i64 0), %0 ], [ getelementptr inbounds ([23 x i8], [23 x i8]* @str.7, i64 0, i64 0), %7 ], [ %11, %9 ]
%14 = call i32 @puts(i8* dereferenceable(1) %13)
ret i32 0
}