#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 *, int *, int *);
main() {
  int n1, n2, n3, n4;
  printf("Please input 4 numbers:\n");
  scanf("%d %d %d %d", &n1, &n2, &n3, &n4);
  printf("You entered:\n%d\n%d\n%d\n%d", n4, n3, n2, n1);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xedc(%rip),%rdi
lea    -0x4(%rbp),%rsi
lea    -0x8(%rbp),%rdx
lea    -0xc(%rbp),%rcx
lea    -0x10(%rbp),%r8
call   1040 <scanf@plt>
mov    -0x10(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x8(%rbp),%ecx
mov    -0x4(%rbp),%r8d
lea    0xebf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xeea(%rip),%rdi
call   1030 <puts@plt>
lea    0xeb9(%rip),%rdi
lea    0x14(%rsp),%rsi
lea    0x10(%rsp),%rdx
lea    0xc(%rsp),%rcx
lea    0x8(%rsp),%r8
call   1050 <scanf@plt>
mov    0x8(%rsp),%esi
mov    0xc(%rsp),%edx
mov    0x10(%rsp),%ecx
mov    0x14(%rsp),%r8d
lea    0xe94(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [25 x i8] c"Please input 4 numbers:\0A\00"
@.str.1 = [12 x i8] c"%d %d %d %d\00"
@.str.2 = [25 x i8] c"You entered:\0A%d\0A%d\0A%d\0A%d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2, i32* %3, i32* %4)
%7 = load i32, i32* %4
%8 = load i32, i32* %3
%9 = load i32, i32* %2
%10 = load i32, i32* %1
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i32 %7, i32 %8, i32 %9, i32 %10)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [12 x i8] c"%d %d %d %d\00"
@.str.2 = [25 x i8] c"You entered:\0A%d\0A%d\0A%d\0A%d\00"
@str = [24 x i8] c"Please input 4 numbers:\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = bitcast i32* %1 to i8*
%6 = bitcast i32* %2 to i8*
%7 = bitcast i32* %3 to i8*
%8 = bitcast i32* %4 to i8*
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @str, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2, i32* %3, i32* %4)
%11 = load i32, i32* %4
%12 = load i32, i32* %3
%13 = load i32, i32* %2
%14 = load i32, i32* %1
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i32 %11, i32 %12, i32 %13, i32 %14)
ret i32 0
}