#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 *countBits(int, int *);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char *argv[]) {
  int retsz;
  int num = 17;
  int *a = countBits(num, &retsz);
  int i;
  for (i = 0; i < retsz; ++i)
    printf("%d ", a[i]);
  printf("\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
movl   $0x11,-0x18(%rbp)
mov    -0x18(%rbp),%edi
lea    -0x14(%rbp),%rsi
call   1030 <countBits@plt>
mov    %rax,-0x20(%rbp)
movl   $0x0,-0x24(%rbp)
mov    -0x24(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    1187 <main+0x67>
mov    -0x20(%rbp),%rax
movslq -0x24(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe8e(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x24(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x24(%rbp)
jmp    1154 <main+0x34>
lea    0xe76(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xc(%rsp),%rsi
mov    $0x11,%edi
call   1040 <countBits@plt>
cmpl   $0x0,0xc(%rsp)
jle    117c <main+0x4c>
mov    %rax,%r15
lea    0xea7(%rip),%r14
xor    %ebx,%ebx
nopl   0x0(%rax,%rax,1)
mov    (%r15,%rbx,4),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
add    $0x1,%rbx
movslq 0xc(%rsp),%rax
cmp    %rax,%rbx
jl     1160 <main+0x30>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [4 x i8] c"%d \00"
@.str.1 = [2 x i8] c"\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32*
%9 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 17, i32* %7
%10 = load i32, i32* %7
%11 = call i32* @countBits(i32 %10, i32* %6)
store i32* %11, i32** %8
store i32 0, i32* %9
br label %12
12: ; preds = %23, %2
%13 = load i32, i32* %9
%14 = load i32, i32* %6
%15 = icmp slt i32 %13, %14
br i1 %15, label %16, label %26
16: ; preds = %12
%17 = load i32*, i32** %8
%18 = load i32, i32* %9
%19 = sext i32 %18 to i64
%20 = getelementptr inbounds i32, i32* %17, i64 %19
%21 = load i32, i32* %20
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %21)
br label %23
23: ; preds = %16
%24 = load i32, i32* %9
%25 = add nsw i32 %24, 1
store i32 %25, i32* %9
br label %12
26: ; preds = %12
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [4 x i8] c"%d \00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca i32
%4 = bitcast i32* %3 to i8*
%5 = call i32* @countBits(i32 17, i32* %3)
%6 = load i32, i32* %3
%7 = icmp sgt i32 %6, 0
br i1 %7, label %8, label %17
8: ; preds = %2, %8
%9 = phi i64 [ %13, %8 ], [ 0, %2 ]
%10 = getelementptr inbounds i32, i32* %5, i64 %9
%11 = load i32, i32* %10
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %11)
%13 = add nuw nsw i64 %9, 1
%14 = load i32, i32* %3
%15 = sext i32 %14 to i64
%16 = icmp slt i64 %13, %15
br i1 %16, label %8, label %17
17: ; preds = %8, %2
%18 = call i32 @putchar(i32 10)
ret i32 0
}