#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 partition(int *, int, int, int);
void quicksort(int array[], int left, int right) {
  int pivot_index = left;
  int pivot_new_index;
  if (right > left) {
    pivot_new_index = partition(array, left, right, pivot_index);
    quicksort(array, left, pivot_new_index - 1);
    quicksort(array, pivot_new_index + 1, right);
  }
}


x86 assembly (clang, -O0):
<quicksort>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    %edx,-0x10(%rbp)
mov    -0xc(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jle    117d <quicksort+0x5d>
mov    -0x8(%rbp),%rdi
mov    -0xc(%rbp),%esi
mov    -0x10(%rbp),%edx
mov    -0x14(%rbp),%ecx
call   1030 <partition@plt>
mov    %eax,-0x18(%rbp)
mov    -0x8(%rbp),%rdi
mov    -0xc(%rbp),%esi
mov    -0x18(%rbp),%edx
sub    $0x1,%edx
call   1040 <quicksort@plt>
mov    -0x8(%rbp),%rdi
mov    -0x18(%rbp),%esi
add    $0x1,%esi
mov    -0x10(%rbp),%edx
call   1040 <quicksort@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<quicksort>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
cmp    %esi,%edx
jle    1168 <quicksort+0x48>
mov    %edx,%r14d
mov    %esi,%ebp
mov    %rdi,%r15
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
mov    %r15,%rdi
mov    %ebp,%esi
mov    %r14d,%edx
mov    %ebp,%ecx
call   1030 <partition@plt>
mov    %eax,%ebx
lea    -0x1(%rbx),%edx
mov    %r15,%rdi
mov    %ebp,%esi
call   1040 <quicksort@plt>
add    $0x1,%ebx
mov    %ebx,%ebp
cmp    %r14d,%ebx
jl     1140 <quicksort+0x20>
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

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

LLVM IR (-O2):
define void @quicksort(i32* %0, i32 %1, i32 %2) {
%4 = icmp sgt i32 %2, %1
br i1 %4, label %5, label %11
5: ; preds = %3, %5
%6 = phi i32 [ %9, %5 ], [ %1, %3 ]
%7 = tail call i32 @partition(i32* %0, i32 %6, i32 %2, i32 %6)
%8 = add nsw i32 %7, -1
tail call void @quicksort(i32* %0, i32 %6, i32 %8)
%9 = add nsw i32 %7, 1
%10 = icmp slt i32 %9, %2
br i1 %10, label %5, label %11
11: ; preds = %5, %3
ret void
}