#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*/ Merge(int *, int, int, int);
int /*<<< orphan*/ print();
void MergeSort(int *a, int l, int r) {
  if (l == r)
    return;
  int m = (l + r) / 2;
  MergeSort(a, l, m);
  MergeSort(a, m + 1, r);
  Merge(a, l, m, r);
  print();
}


x86 assembly (clang, -O0):
<MergeSort>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    %edx,-0x10(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x10(%rbp),%eax
jne    1153 <MergeSort+0x23>
jmp    119e <MergeSort+0x6e>
mov    -0xc(%rbp),%eax
add    -0x10(%rbp),%eax
mov    $0x2,%ecx
cltd
idiv   %ecx
mov    %eax,-0x14(%rbp)
mov    -0x8(%rbp),%rdi
mov    -0xc(%rbp),%esi
mov    -0x14(%rbp),%edx
call   1050 <MergeSort@plt>
mov    -0x8(%rbp),%rdi
mov    -0x14(%rbp),%esi
add    $0x1,%esi
mov    -0x10(%rbp),%edx
call   1050 <MergeSort@plt>
mov    -0x8(%rbp),%rdi
mov    -0xc(%rbp),%esi
mov    -0x14(%rbp),%edx
mov    -0x10(%rbp),%ecx
call   1030 <Merge@plt>
mov    $0x0,%al
call   1040 <print@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<MergeSort>:
cmp    %edx,%esi
jne    1135 <MergeSort+0x5>
ret
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %edx,%r14d
mov    %esi,%r12d
mov    %rdi,%r15
lea    (%r14,%r12,1),%eax
mov    %eax,%ebx
shr    $0x1f,%ebx
add    %eax,%ebx
sar    %ebx
mov    %ebx,%edx
call   1050 <MergeSort@plt>
lea    0x1(%rbx),%esi
mov    %r15,%rdi
mov    %r14d,%edx
call   1050 <MergeSort@plt>
mov    %r15,%rdi
mov    %r12d,%esi
mov    %ebx,%edx
mov    %r14d,%ecx
call   1030 <Merge@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
jmp    1040 <print@plt>

LLVM IR (-O0):
define void @MergeSort(i32* %0, i32 %1, i32 %2) {
%4 = alloca i32*
%5 = alloca i32
%6 = alloca i32
%7 = alloca i32
store i32* %0, i32** %4
store i32 %1, i32* %5
store i32 %2, i32* %6
%8 = load i32, i32* %5
%9 = load i32, i32* %6
%10 = icmp eq i32 %8, %9
br i1 %10, label %11, label %12
11: ; preds = %3
br label %30
12: ; preds = %3
%13 = load i32, i32* %5
%14 = load i32, i32* %6
%15 = add nsw i32 %13, %14
%16 = sdiv i32 %15, 2
store i32 %16, i32* %7
%17 = load i32*, i32** %4
%18 = load i32, i32* %5
%19 = load i32, i32* %7
%20 = load i32*, i32** %4
%21 = load i32, i32* %7
%22 = add nsw i32 %21, 1
%23 = load i32, i32* %6
%24 = load i32*, i32** %4
%25 = load i32, i32* %5
%26 = load i32, i32* %7
%27 = load i32, i32* %6
%28 = call i32 @Merge(i32* %24, i32 %25, i32 %26, i32 %27)
%29 = call i32 (...) @print()
br label %30
30: ; preds = %12, %11
ret void
}

LLVM IR (-O2):
define void @MergeSort(i32* %0, i32 %1, i32 %2) {
%4 = icmp eq i32 %1, %2
br i1 %4, label %5, label %6
5: ; preds = %3, %6
ret void
6: ; preds = %3
%7 = add nsw i32 %2, %1
%8 = sdiv i32 %7, 2
tail call void @MergeSort(i32* %0, i32 %1, i32 %8)
%9 = add nsw i32 %8, 1
tail call void @MergeSort(i32* %0, i32 %9, i32 %2)
%10 = tail call i32 @Merge(i32* %0, i32 %1, i32 %8, i32 %2)
%11 = tail call i32 (...) @print()
br label %5
}