#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*/ mergesort(int *, int /*<<< orphan*/, int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int a[30], i, n;
  printf("\nEnter no of elements: ");
  scanf("%d", &n);
  printf("Enter array elements: ");
  for (i = 0; i < n; i++)
    scanf("%d", &a[i]);
  mergesort(a, 0, n - 1);
  printf("\nSorted array is: ");
  for (i = 0; i < n; i++)
    printf("%d ", a[i]);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x90,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeb7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec1(%rip),%rdi
lea    -0x88(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xeb1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x84(%rbp)
mov    -0x84(%rbp),%eax
cmp    -0x88(%rbp),%eax
jge    11bf <main+0x8f>
movslq -0x84(%rbp),%rax
lea    -0x80(%rbp),%rsi
shl    $0x2,%rax
add    %rax,%rsi
lea    0xe72(%rip),%rdi
call   1040 <scanf@plt>
mov    -0x84(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x84(%rbp)
jmp    117b <main+0x4b>
lea    -0x80(%rbp),%rdi
mov    -0x88(%rbp),%edx
sub    $0x1,%edx
xor    %esi,%esi
call   1050 <mergesort@plt>
lea    0xe58(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x84(%rbp)
mov    -0x84(%rbp),%eax
cmp    -0x88(%rbp),%eax
jge    122a <main+0xfa>
movslq -0x84(%rbp),%rax
mov    -0x80(%rbp,%rax,4),%esi
lea    0xe36(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x84(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x84(%rbp)
jmp    11eb <main+0xbb>
xor    %eax,%eax
add    $0x90,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x90,%rsp
lea    0xebd(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xec7(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1040 <scanf@plt>
lea    0xeb9(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
test   %edx,%edx
jle    119d <main+0x6d>
lea    0x10(%rsp),%r15
xor    %ebx,%ebx
lea    0xe99(%rip),%r14
nop
mov    %r14,%rdi
mov    %r15,%rsi
call   1040 <scanf@plt>
add    $0x1,%rbx
movslq 0xc(%rsp),%rdx
add    $0x4,%r15
cmp    %rdx,%rbx
jl     1180 <main+0x50>
add    $0xffffffff,%edx
lea    0x10(%rsp),%rdi
xor    %esi,%esi
call   1050 <mergesort@plt>
lea    0xe7f(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
cmpl   $0x0,0xc(%rsp)
jle    11ec <main+0xbc>
lea    0xe7d(%rip),%r14
xor    %ebx,%ebx
nopw   0x0(%rax,%rax,1)
mov    0x10(%rsp,%rbx,4),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
add    $0x1,%rbx
movslq 0xc(%rsp),%rax
cmp    %rax,%rbx
jl     11d0 <main+0xa0>
xor    %eax,%eax
add    $0x90,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [24 x i8] c"\0AEnter no of elements: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [23 x i8] c"Enter array elements: \00"
@.str.3 = [19 x i8] c"\0ASorted array is: \00"
@.str.4 = [4 x i8] c"%d \00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [30 x i32]
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 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* %4)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0))
store i32 0, i32* %3
br label %8
8: ; preds = %17, %0
%9 = load i32, i32* %3
%10 = load i32, i32* %4
%11 = icmp slt i32 %9, %10
br i1 %11, label %12, label %20
12: ; preds = %8
%13 = load i32, i32* %3
%14 = sext i32 %13 to i64
%15 = getelementptr inbounds [30 x i32], [30 x i32]* %2, i64 0, i64 %14
%16 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %15)
br label %17
17: ; preds = %12
%18 = load i32, i32* %3
%19 = add nsw i32 %18, 1
store i32 %19, i32* %3
br label %8
20: ; preds = %8
%21 = getelementptr inbounds [30 x i32], [30 x i32]* %2, i64 0, i64 0
%22 = load i32, i32* %4
%23 = sub nsw i32 %22, 1
%24 = call i32 @mergesort(i32* %21, i32 0, i32 %23)
%25 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0))
store i32 0, i32* %3
br label %26
26: ; preds = %36, %20
%27 = load i32, i32* %3
%28 = load i32, i32* %4
%29 = icmp slt i32 %27, %28
br i1 %29, label %30, label %39
30: ; preds = %26
%31 = load i32, i32* %3
%32 = sext i32 %31 to i64
%33 = getelementptr inbounds [30 x i32], [30 x i32]* %2, i64 0, i64 %32
%34 = load i32, i32* %33
%35 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 %34)
br label %36
36: ; preds = %30
%37 = load i32, i32* %3
%38 = add nsw i32 %37, 1
store i32 %38, i32* %3
br label %26
39: ; preds = %26
ret i32 0
}

LLVM IR (-O2):
@.str = [24 x i8] c"\0AEnter no of elements: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [23 x i8] c"Enter array elements: \00"
@.str.3 = [19 x i8] c"\0ASorted array is: \00"
@.str.4 = [4 x i8] c"%d \00"
define i32 @main() {
%1 = alloca [30 x i32]
%2 = alloca i32
%3 = bitcast [30 x i32]* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 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 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0))
%8 = load i32, i32* %2
%9 = icmp sgt i32 %8, 0
br i1 %9, label %10, label %18
10: ; preds = %0, %10
%11 = phi i64 [ %14, %10 ], [ 0, %0 ]
%12 = getelementptr inbounds [30 x i32], [30 x i32]* %1, i64 0, i64 %11
%13 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %12)
%14 = add nuw nsw i64 %11, 1
%15 = load i32, i32* %2
%16 = sext i32 %15 to i64
%17 = icmp slt i64 %14, %16
br i1 %17, label %10, label %18
18: ; preds = %10, %0
%19 = phi i32 [ %8, %0 ], [ %15, %10 ]
%20 = getelementptr inbounds [30 x i32], [30 x i32]* %1, i64 0, i64 0
%21 = add nsw i32 %19, -1
%22 = call i32 @mergesort(i32* %20, i32 0, i32 %21)
%23 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0))
%24 = load i32, i32* %2
%25 = icmp sgt i32 %24, 0
br i1 %25, label %26, label %35
26: ; preds = %18, %26
%27 = phi i64 [ %31, %26 ], [ 0, %18 ]
%28 = getelementptr inbounds [30 x i32], [30 x i32]* %1, i64 0, i64 %27
%29 = load i32, i32* %28
%30 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 %29)
%31 = add nuw nsw i64 %27, 1
%32 = load i32, i32* %2
%33 = sext i32 %32 to i64
%34 = icmp slt i64 %31, %33
br i1 %34, label %26, label %35
35: ; preds = %26, %18
ret i32 0
}