#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);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ putchar(char);
int main(void) {
  int i, key[] = {4, 3, 1, 67, 55, 8, 0, 4, -5, 37, 7, 4, 2, 9, 1, -1};
  mergesort(key, 16);
  printf("After mergesort:\n");
  for (i = 0; i < 16; ++i)
    printf("%4d", key[i]);
  putchar('\n');
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x50,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0x50(%rbp),%rdi
lea    0xea6(%rip),%rsi
mov    $0x40,%edx
call   1050 <memcpy@plt>
lea    -0x50(%rbp),%rdi
mov    $0x10,%esi
call   1060 <mergesort@plt>
lea    0xec7(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x0,-0x8(%rbp)
cmpl   $0x10,-0x8(%rbp)
jge    11b5 <main+0x75>
movslq -0x8(%rbp),%rax
mov    -0x50(%rbp,%rax,4),%esi
lea    0xeb2(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1187 <main+0x47>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x50,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x40,%rsp
movaps 0xee4(%rip),%xmm0
movaps %xmm0,0x30(%rsp)
movaps 0xec8(%rip),%xmm0
movaps %xmm0,0x20(%rsp)
movaps 0xeac(%rip),%xmm0
movaps %xmm0,0x10(%rsp)
movaps 0xe90(%rip),%xmm0
movaps %xmm0,(%rsp)
mov    %rsp,%rdi
mov    $0x10,%esi
call   1060 <mergesort@plt>
lea    0xebc(%rip),%rdi
call   1040 <puts@plt>
mov    (%rsp),%esi
lea    0xea9(%rip),%rbx
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x4(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x8(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0xc(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x10(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x14(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x18(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x1c(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x20(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x24(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x28(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x2c(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x30(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x34(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x38(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x3c(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x40,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@__const.main.key = [16 x i32] [i32 4, i32 3, i32 1, i32 67, i32 55, i32 8, i32 0, i32 4, i32 -5, i32 37, i32 7, i32 4, i32 2, i32 9, i32 1, i32 -1]
@.str = [18 x i8] c"After mergesort:\0A\00"
@.str.1 = [4 x i8] c"%4d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca [16 x i32]
store i32 0, i32* %1
%4 = bitcast [16 x i32]* %3 to i8*
%5 = getelementptr inbounds [16 x i32], [16 x i32]* %3, i64 0, i64 0
%6 = call i32 @mergesort(i32* %5, i32 16)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %2
br label %8
8: ; preds = %17, %0
%9 = load i32, i32* %2
%10 = icmp slt i32 %9, 16
br i1 %10, label %11, label %20
11: ; preds = %8
%12 = load i32, i32* %2
%13 = sext i32 %12 to i64
%14 = getelementptr inbounds [16 x i32], [16 x i32]* %3, i64 0, i64 %13
%15 = load i32, i32* %14
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %15)
br label %17
17: ; preds = %11
%18 = load i32, i32* %2
%19 = add nsw i32 %18, 1
store i32 %19, i32* %2
br label %8
20: ; preds = %8
%21 = call i32 @putchar(i8 signext 10)
ret i32 0
}

LLVM IR (-O2):
@__const.main.key = [16 x i32] [i32 4, i32 3, i32 1, i32 67, i32 55, i32 8, i32 0, i32 4, i32 -5, i32 37, i32 7, i32 4, i32 2, i32 9, i32 1, i32 -1]
@.str.1 = [4 x i8] c"%4d\00"
@str = [17 x i8] c"After mergesort:\00"
define i32 @main() {
%1 = alloca [16 x i32]
%2 = bitcast [16 x i32]* %1 to i8*
%3 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 0
%4 = call i32 @mergesort(i32* %3, i32 16)
%5 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @str, i64 0, i64 0))
%6 = load i32, i32* %3
%7 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %6)
%8 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 1
%9 = load i32, i32* %8
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %9)
%11 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 2
%12 = load i32, i32* %11
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %12)
%14 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 3
%15 = load i32, i32* %14
%16 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %15)
%17 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 4
%18 = load i32, i32* %17
%19 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %18)
%20 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 5
%21 = load i32, i32* %20
%22 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %21)
%23 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 6
%24 = load i32, i32* %23
%25 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %24)
%26 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 7
%27 = load i32, i32* %26
%28 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %27)
%29 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 8
%30 = load i32, i32* %29
%31 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %30)
%32 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 9
%33 = load i32, i32* %32
%34 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %33)
%35 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 10
%36 = load i32, i32* %35
%37 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %36)
%38 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 11
%39 = load i32, i32* %38
%40 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %39)
%41 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 12
%42 = load i32, i32* %41
%43 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %42)
%44 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 13
%45 = load i32, i32* %44
%46 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %45)
%47 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 14
%48 = load i32, i32* %47
%49 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %48)
%50 = getelementptr inbounds [16 x i32], [16 x i32]* %1, i64 0, i64 15
%51 = load i32, i32* %50
%52 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %51)
%53 = call i32 @putchar(i8 signext 10)
ret i32 0
}