#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*/ free(int *);
scalar_t__ malloc(int);
int /*<<< orphan*/ merge_sort(int *, int /*<<< orphan*/, int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int n;
  printf("How many numbers? ");
  scanf("%d", &n);
  int *input = (int *)malloc(n * sizeof(int));
  printf("Enter %d numbers: ", n);
  for (int i = 0; i < n; i++) {
    scanf("%d", &input[i]);
  }
  merge_sort(input, 0, n - 1);
  for (int i = 0; i < n; i++) {
    printf("%d\t", *(input + i));
  }
  free(input);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe9a(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe9f(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1070 <scanf@plt>
movslq -0x8(%rbp),%rax
shl    $0x2,%rax
mov    %eax,%edi
call   1050 <malloc@plt>
mov    %rax,-0x10(%rbp)
mov    -0x8(%rbp),%esi
lea    0xe7c(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11dd <main+0x8d>
mov    -0x10(%rbp),%rsi
movslq -0x14(%rbp),%rax
shl    $0x2,%rax
add    %rax,%rsi
lea    0xe49(%rip),%rdi
call   1070 <scanf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    11a8 <main+0x58>
mov    -0x10(%rbp),%rdi
mov    -0x8(%rbp),%edx
sub    $0x1,%edx
xor    %esi,%esi
call   1060 <merge_sort@plt>
movl   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    1228 <main+0xd8>
mov    -0x10(%rbp),%rax
movslq -0x18(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe16(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    11f5 <main+0xa5>
mov    -0x10(%rbp),%rdi
call   1030 <free@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    0xea1(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xea6(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1070 <scanf@plt>
mov    0x4(%rsp),%edi
shl    $0x2,%edi
call   1050 <malloc@plt>
mov    %rax,%r14
mov    0x4(%rsp),%esi
lea    0xe85(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x4(%rsp),%edx
test   %edx,%edx
jle    11cd <main+0x7d>
xor    %r12d,%r12d
lea    0xe69(%rip),%r15
mov    %r14,%rbx
nopl   (%rax)
mov    %r15,%rdi
mov    %rbx,%rsi
call   1070 <scanf@plt>
add    $0x1,%r12
movslq 0x4(%rsp),%rdx
add    $0x4,%rbx
cmp    %rdx,%r12
jl     11b0 <main+0x60>
add    $0xffffffff,%edx
mov    %r14,%rdi
xor    %esi,%esi
call   1060 <merge_sort@plt>
cmpl   $0x0,0x4(%rsp)
jle    120c <main+0xbc>
lea    0xe41(%rip),%r15
xor    %ebx,%ebx
nopw   0x0(%rax,%rax,1)
mov    (%r14,%rbx,4),%esi
mov    %r15,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%rbx
movslq 0x4(%rsp),%rax
cmp    %rax,%rbx
jl     11f0 <main+0xa0>
mov    %r14,%rdi
call   1030 <free@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [19 x i8] c"How many numbers? \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [19 x i8] c"Enter %d numbers: \00"
@.str.3 = [4 x i8] c"%d\09\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32*
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%8 = load i32, i32* %2
%9 = sext i32 %8 to i64
%10 = mul i64 %9, 4
%11 = trunc i64 %10 to i32
%12 = call i64 @malloc(i32 %11)
%13 = inttoptr i64 %12 to i32*
store i32* %13, i32** %3
%14 = load i32, i32* %2
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0), i32 %14)
store i32 0, i32* %4
br label %16
16: ; preds = %26, %0
%17 = load i32, i32* %4
%18 = load i32, i32* %2
%19 = icmp slt i32 %17, %18
br i1 %19, label %20, label %29
20: ; preds = %16
%21 = load i32*, i32** %3
%22 = load i32, i32* %4
%23 = sext i32 %22 to i64
%24 = getelementptr inbounds i32, i32* %21, i64 %23
%25 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %24)
br label %26
26: ; preds = %20
%27 = load i32, i32* %4
%28 = add nsw i32 %27, 1
store i32 %28, i32* %4
br label %16
29: ; preds = %16
%30 = load i32*, i32** %3
%31 = load i32, i32* %2
%32 = sub nsw i32 %31, 1
%33 = call i32 @merge_sort(i32* %30, i32 0, i32 %32)
store i32 0, i32* %5
br label %34
34: ; preds = %45, %29
%35 = load i32, i32* %5
%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** %3
%40 = load i32, i32* %5
%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* %5
%47 = add nsw i32 %46, 1
store i32 %47, i32* %5
br label %34
48: ; preds = %34
%49 = load i32*, i32** %3
%50 = call i32 @free(i32* %49)
%51 = load i32, i32* %1
ret i32 %51
}

LLVM IR (-O2):
@.str = [19 x i8] c"How many numbers? \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [19 x i8] c"Enter %d numbers: \00"
@.str.3 = [4 x i8] c"%d\09\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 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 = load i32, i32* %1
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0), i32 %9)
%11 = load i32, i32* %1
%12 = icmp sgt i32 %11, 0
br i1 %12, label %19, label %13
13: ; preds = %19, %0
%14 = phi i32 [ %11, %0 ], [ %24, %19 ]
%15 = add nsw i32 %14, -1
%16 = call i32 @merge_sort(i32* %8, i32 0, i32 %15)
%17 = load i32, i32* %1
%18 = icmp sgt i32 %17, 0
br i1 %18, label %29, label %27
19: ; preds = %0, %19
%20 = phi i64 [ %23, %19 ], [ 0, %0 ]
%21 = getelementptr inbounds i32, i32* %8, i64 %20
%22 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %21)
%23 = add nuw nsw i64 %20, 1
%24 = load i32, i32* %1
%25 = sext i32 %24 to i64
%26 = icmp slt i64 %23, %25
br i1 %26, label %19, label %13
27: ; preds = %29, %13
%28 = call i32 @free(i32* %8)
ret i32 0
29: ; preds = %13, %29
%30 = phi i64 [ %34, %29 ], [ 0, %13 ]
%31 = getelementptr inbounds i32, i32* %8, i64 %30
%32 = load i32, i32* %31
%33 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %32)
%34 = add nuw nsw i64 %30, 1
%35 = load i32, i32* %1
%36 = sext i32 %35 to i64
%37 = icmp slt i64 %34, %36
br i1 %37, label %29, label %27
}