#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*/ build_max_heap(int *, int);
int /*<<< orphan*/ max_heapify(int *, int /*<<< orphan*/, int);
void heapsort(int a[], int heapsize) {
  int i, tmp;
  build_max_heap(a, heapsize);
  for (i = heapsize; i > 0; i--) {
    tmp = a[i];
    a[i] = a[0];
    a[0] = tmp;
    heapsize--;
    max_heapify(a, 0, heapsize);
  }
}


x86 assembly (clang, -O0):
<heapsort>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    -0x8(%rbp),%rdi
mov    -0xc(%rbp),%esi
call   1040 <build_max_heap@plt>
mov    -0xc(%rbp),%eax
mov    %eax,-0x10(%rbp)
cmpl   $0x0,-0x10(%rbp)
jle    1198 <heapsort+0x78>
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
mov    (%rax,%rcx,4),%eax
mov    %eax,-0x14(%rbp)
mov    -0x8(%rbp),%rax
mov    (%rax),%edx
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
mov    %edx,(%rax,%rcx,4)
mov    -0x14(%rbp),%ecx
mov    -0x8(%rbp),%rax
mov    %ecx,(%rax)
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%rdi
mov    -0xc(%rbp),%edx
xor    %esi,%esi
call   1030 <max_heapify@plt>
mov    -0x10(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0x10(%rbp)
jmp    1141 <heapsort+0x21>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<heapsort>:
push   %rbp
push   %r14
push   %rbx
mov    %esi,%ebp
mov    %rdi,%rbx
call   1040 <build_max_heap@plt>
test   %ebp,%ebp
jle    1164 <heapsort+0x44>
mov    %ebp,%ebp
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
mov    (%rbx,%rbp,4),%eax
mov    (%rbx),%ecx
mov    %ecx,(%rbx,%rbp,4)
mov    %eax,(%rbx)
lea    -0x1(%rbp),%r14
mov    %rbx,%rdi
xor    %esi,%esi
mov    %r14d,%edx
call   1030 <max_heapify@plt>
cmp    $0x1,%rbp
mov    %r14,%rbp
ja     1140 <heapsort+0x20>
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
define void @heapsort(i32* %0, i32 %1) {
%3 = alloca i32*
%4 = alloca i32
%5 = alloca i32
%6 = alloca i32
store i32* %0, i32** %3
store i32 %1, i32* %4
%7 = load i32*, i32** %3
%8 = load i32, i32* %4
%9 = call i32 @build_max_heap(i32* %7, i32 %8)
%10 = load i32, i32* %4
store i32 %10, i32* %5
br label %11
11: ; preds = %35, %2
%12 = load i32, i32* %5
%13 = icmp sgt i32 %12, 0
br i1 %13, label %14, label %38
14: ; preds = %11
%15 = load i32*, i32** %3
%16 = load i32, i32* %5
%17 = sext i32 %16 to i64
%18 = getelementptr inbounds i32, i32* %15, i64 %17
%19 = load i32, i32* %18
store i32 %19, i32* %6
%20 = load i32*, i32** %3
%21 = getelementptr inbounds i32, i32* %20, i64 0
%22 = load i32, i32* %21
%23 = load i32*, i32** %3
%24 = load i32, i32* %5
%25 = sext i32 %24 to i64
%26 = getelementptr inbounds i32, i32* %23, i64 %25
store i32 %22, i32* %26
%27 = load i32, i32* %6
%28 = load i32*, i32** %3
%29 = getelementptr inbounds i32, i32* %28, i64 0
store i32 %27, i32* %29
%30 = load i32, i32* %4
%31 = add nsw i32 %30, -1
store i32 %31, i32* %4
%32 = load i32*, i32** %3
%33 = load i32, i32* %4
%34 = call i32 @max_heapify(i32* %32, i32 0, i32 %33)
br label %35
35: ; preds = %14
%36 = load i32, i32* %5
%37 = add nsw i32 %36, -1
store i32 %37, i32* %5
br label %11
38: ; preds = %11
ret void
}

LLVM IR (-O2):
define void @heapsort(i32* %0, i32 %1) {
%3 = tail call i32 @build_max_heap(i32* %0, i32 %1)
%4 = icmp sgt i32 %1, 0
br i1 %4, label %5, label %16
5: ; preds = %2
%6 = zext i32 %1 to i64
br label %7
7: ; preds = %5, %7
%8 = phi i64 [ %6, %5 ], [ %12, %7 ]
%9 = getelementptr inbounds i32, i32* %0, i64 %8
%10 = load i32, i32* %9
%11 = load i32, i32* %0
store i32 %11, i32* %9
store i32 %10, i32* %0
%12 = add nsw i64 %8, -1
%13 = trunc i64 %12 to i32
%14 = tail call i32 @max_heapify(i32* %0, i32 0, i32 %13)
%15 = icmp ugt i64 %8, 1
br i1 %15, label %7, label %16
16: ; preds = %7, %2
ret void
}