#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 */
typedef int /*<<< orphan*/ list;

/* Variables and functions */
int /*<<< orphan*/ printArray(int *, int);
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ quicksort(int *, int, int /*<<< orphan*/, int);
int main() {
  int list[] = {6, 5, 3, 1, 8, 7, 2, 4};
  int n = sizeof(list) / sizeof(list[0]);
  printf("unsorted list\n");
  printArray(list, n);
  quicksort(list, n, 0, n - 1);
  printf("sorted list\n");
  printArray(list, n);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
movl   $0x0,-0x4(%rbp)
mov    0xeba(%rip),%rax
mov    %rax,-0x30(%rbp)
mov    0xeb7(%rip),%rax
mov    %rax,-0x28(%rbp)
mov    0xeb4(%rip),%rax
mov    %rax,-0x20(%rbp)
mov    0xeb1(%rip),%rax
mov    %rax,-0x18(%rbp)
movl   $0x8,-0x34(%rbp)
lea    0xea7(%rip),%rdi
call   1040 <printf@plt>
lea    -0x30(%rbp),%rdi
mov    -0x34(%rbp),%esi
call   1050 <printArray@plt>
lea    -0x30(%rbp),%rdi
mov    -0x34(%rbp),%esi
mov    -0x34(%rbp),%ecx
sub    $0x1,%ecx
xor    %edx,%edx
call   1030 <quicksort@plt>
lea    0xe7d(%rip),%rdi
call   1040 <printf@plt>
lea    -0x30(%rbp),%rdi
mov    -0x34(%rbp),%esi
call   1050 <printArray@plt>
xor    %eax,%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x20,%rsp
movaps 0xed4(%rip),%xmm0
movaps %xmm0,0x10(%rsp)
movaps 0xeb8(%rip),%xmm0
movaps %xmm0,(%rsp)
lea    0xecd(%rip),%rdi
call   1030 <puts@plt>
mov    %rsp,%rbx
mov    %rbx,%rdi
mov    $0x8,%esi
call   1050 <printArray@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
xor    %edx,%edx
mov    $0x7,%ecx
call   1040 <quicksort@plt>
lea    0xe9f(%rip),%rdi
call   1030 <puts@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
call   1050 <printArray@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@__const.main.list = [8 x i32] [i32 6, i32 5, i32 3, i32 1, i32 8, i32 7, i32 2, i32 4]
@.str = [15 x i8] c"unsorted list\0A\00"
@.str.1 = [13 x i8] c"sorted list\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [8 x i32]
%3 = alloca i32
store i32 0, i32* %1
%4 = bitcast [8 x i32]* %2 to i8*
store i32 8, i32* %3
%5 = call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%6 = getelementptr inbounds [8 x i32], [8 x i32]* %2, i64 0, i64 0
%7 = load i32, i32* %3
%8 = call i32 @printArray(i32* %6, i32 %7)
%9 = getelementptr inbounds [8 x i32], [8 x i32]* %2, i64 0, i64 0
%10 = load i32, i32* %3
%11 = load i32, i32* %3
%12 = sub nsw i32 %11, 1
%13 = call i32 @quicksort(i32* %9, i32 %10, i32 0, i32 %12)
%14 = call i32 @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0))
%15 = getelementptr inbounds [8 x i32], [8 x i32]* %2, i64 0, i64 0
%16 = load i32, i32* %3
%17 = call i32 @printArray(i32* %15, i32 %16)
ret i32 0
}

LLVM IR (-O2):
@__const.main.list = [8 x i32] [i32 6, i32 5, i32 3, i32 1, i32 8, i32 7, i32 2, i32 4]
@str = [14 x i8] c"unsorted list\00"
@str.2 = [12 x i8] c"sorted list\00"
define i32 @main() {
%1 = alloca [8 x i32]
%2 = bitcast [8 x i32]* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @str, i64 0, i64 0))
%4 = getelementptr inbounds [8 x i32], [8 x i32]* %1, i64 0, i64 0
%5 = call i32 @printArray(i32* %4, i32 8)
%6 = call i32 @quicksort(i32* %4, i32 8, i32 0, i32 7)
%7 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str.2, i64 0, i64 0))
%8 = call i32 @printArray(i32* %4, i32 8)
ret i32 0
}