#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__ malloc(int);
int /*<<< orphan*/ mergesort(int *);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int n, i;
  printf("Enter the number of elements in the array\n");
  scanf("%d", &n);
  int *arr = (int *)malloc(n * sizeof(int));
  printf("Enter the elements\n");
  for (i = 0; i < n; i++) {
    scanf("%d", &arr[i]);
  }
  arr[i] = '\0';
  mergesort(arr);
  for (i = 0; i < n; i++) {
    printf("%d ", arr[i]);
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeaa(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec7(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
movslq -0x8(%rbp),%rax
shl    $0x2,%rax
mov    %eax,%edi
call   1040 <malloc@plt>
mov    %rax,-0x18(%rbp)
lea    0xea7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11ca <main+0x8a>
mov    -0x18(%rbp),%rsi
movslq -0xc(%rbp),%rax
shl    $0x2,%rax
add    %rax,%rsi
lea    0xe74(%rip),%rdi
call   1050 <scanf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1195 <main+0x55>
mov    -0x18(%rbp),%rax
movslq -0xc(%rbp),%rcx
movl   $0x0,(%rax,%rcx,4)
mov    -0x18(%rbp),%rdi
call   1060 <mergesort@plt>
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    121c <main+0xdc>
mov    -0x18(%rbp),%rax
movslq -0xc(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe3b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    11e9 <main+0xa9>
lea    0xe1d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xe98(%rip),%rdi
call   1040 <puts@plt>
lea    0xe85(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1070 <scanf@plt>
mov    0x4(%rsp),%edi
shl    $0x2,%edi
call   1060 <malloc@plt>
mov    %rax,%r15
lea    0xe96(%rip),%rdi
call   1040 <puts@plt>
cmpl   $0x0,0x4(%rsp)
jle    11df <main+0x7f>
xor    %r12d,%r12d
lea    0xe4f(%rip),%r14
mov    %r15,%rbx
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
mov    %r14,%rdi
mov    %rbx,%rsi
call   1070 <scanf@plt>
add    $0x1,%r12
movslq 0x4(%rsp),%rax
add    $0x4,%rbx
cmp    %rax,%r12
jl     11c0 <main+0x60>
jmp    11e2 <main+0x82>
xor    %r12d,%r12d
movl   $0x0,(%r15,%r12,4)
mov    %r15,%rdi
call   1080 <mergesort@plt>
cmpl   $0x0,0x4(%rsp)
jle    122c <main+0xcc>
lea    0xe03(%rip),%r14
xor    %ebx,%ebx
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    (%r15,%rbx,4),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
add    $0x1,%rbx
movslq 0x4(%rsp),%rax
cmp    %rax,%rbx
jl     1210 <main+0xb0>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [43 x i8] c"Enter the number of elements in the array\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [20 x i8] c"Enter the elements\0A\00"
@.str.3 = [4 x i8] c"%d \00"
@.str.4 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32*
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([43 x i8], [43 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%7 = load i32, i32* %2
%8 = sext i32 %7 to i64
%9 = mul i64 %8, 4
%10 = trunc i64 %9 to i32
%11 = call i64 @malloc(i32 %10)
%12 = inttoptr i64 %11 to i32*
store i32* %12, i32** %4
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0))
store i32 0, i32* %3
br label %14
14: ; preds = %24, %0
%15 = load i32, i32* %3
%16 = load i32, i32* %2
%17 = icmp slt i32 %15, %16
br i1 %17, label %18, label %27
18: ; preds = %14
%19 = load i32*, i32** %4
%20 = load i32, i32* %3
%21 = sext i32 %20 to i64
%22 = getelementptr inbounds i32, i32* %19, i64 %21
%23 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %22)
br label %24
24: ; preds = %18
%25 = load i32, i32* %3
%26 = add nsw i32 %25, 1
store i32 %26, i32* %3
br label %14
27: ; preds = %14
%28 = load i32*, i32** %4
%29 = load i32, i32* %3
%30 = sext i32 %29 to i64
%31 = getelementptr inbounds i32, i32* %28, i64 %30
store i32 0, i32* %31
%32 = load i32*, i32** %4
%33 = call i32 @mergesort(i32* %32)
store i32 0, i32* %3
br label %34
34: ; preds = %45, %27
%35 = load i32, i32* %3
%36 = load i32, i32* %2
%37 = icmp slt i32 %35, %36
br i1 %37, label %38, label %48
38: ; preds = %34
%39 = load i32*, i32** %4
%40 = load i32, i32* %3
%41 = sext i32 %40 to i64
%42 = getelementptr inbounds i32, i32* %39, i64 %41
%43 = load i32, i32* %42
%44 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %43)
br label %45
45: ; preds = %38
%46 = load i32, i32* %3
%47 = add nsw i32 %46, 1
store i32 %47, i32* %3
br label %34
48: ; preds = %34
%49 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.4, i64 0, i64 0))
%50 = load i32, i32* %1
ret i32 %50
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.3 = [4 x i8] c"%d \00"
@str = [42 x i8] c"Enter the number of elements in the array\00"
@str.5 = [19 x i8] c"Enter the elements\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([42 x i8], [42 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 = shl i32 %5, 2
%7 = call i64 @malloc(i32 %6)
%8 = inttoptr i64 %7 to i32*
%9 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @str.5, i64 0, i64 0))
%10 = load i32, i32* %1
%11 = icmp sgt i32 %10, 0
br i1 %11, label %12, label %22
12: ; preds = %0, %12
%13 = phi i64 [ %16, %12 ], [ 0, %0 ]
%14 = getelementptr inbounds i32, i32* %8, i64 %13
%15 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %14)
%16 = add nuw nsw i64 %13, 1
%17 = load i32, i32* %1
%18 = sext i32 %17 to i64
%19 = icmp slt i64 %16, %18
br i1 %19, label %12, label %20
20: ; preds = %12
%21 = and i64 %16, 4294967295
br label %22
22: ; preds = %20, %0
%23 = phi i64 [ 0, %0 ], [ %21, %20 ]
%24 = getelementptr inbounds i32, i32* %8, i64 %23
store i32 0, i32* %24
%25 = call i32 @mergesort(i32* %8)
%26 = load i32, i32* %1
%27 = icmp sgt i32 %26, 0
br i1 %27, label %28, label %37
28: ; preds = %22, %28
%29 = phi i64 [ %33, %28 ], [ 0, %22 ]
%30 = getelementptr inbounds i32, i32* %8, i64 %29
%31 = load i32, i32* %30
%32 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %31)
%33 = add nuw nsw i64 %29, 1
%34 = load i32, i32* %1
%35 = sext i32 %34 to i64
%36 = icmp slt i64 %33, %35
br i1 %36, label %28, label %37
37: ; preds = %28, %22
%38 = call i32 @putchar(i32 10)
ret i32 0
}