#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*/ atoi(char *);
int *countBits(int /*<<< orphan*/, int *);
int /*<<< orphan*/ free(int *);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char **argv) {
  if (argc < 2) {
    printf("countBits <n>\n");
    return 0;
  }
  int *result, size, i;
  result = countBits(atoi(argv[1]), &size);
  for (i = 0; i < size; i++) {
    printf("%4d ", result[i]);
  }
  free(result);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    117a <main+0x3a>
lea    0xe99(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
movl   $0x0,-0x4(%rbp)
jmp    11d9 <main+0x99>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,%edi
lea    -0x1c(%rbp),%rsi
call   1040 <countBits@plt>
mov    %rax,-0x18(%rbp)
movl   $0x0,-0x20(%rbp)
mov    -0x20(%rbp),%eax
cmp    -0x1c(%rbp),%eax
jge    11d0 <main+0x90>
mov    -0x18(%rbp),%rax
movslq -0x20(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe54(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
mov    -0x20(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x20(%rbp)
jmp    119d <main+0x5d>
mov    -0x18(%rbp),%rdi
call   1030 <free@plt>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
cmp    $0x1,%edi
jg     116c <main+0x1c>
lea    0xea0(%rip),%rdi
call   1040 <puts@plt>
jmp    11c4 <main+0x74>
mov    0x8(%rsi),%rdi
call   1070 <atoi@plt>
lea    0xc(%rsp),%rsi
mov    %eax,%edi
call   1050 <countBits@plt>
mov    %rax,%r15
cmpl   $0x0,0xc(%rsp)
jle    11bc <main+0x6c>
lea    0xe6e(%rip),%r14
xor    %ebx,%ebx
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
mov    (%r15,%rbx,4),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1060 <printf@plt>
add    $0x1,%rbx
movslq 0xc(%rsp),%rax
cmp    %rax,%rbx
jl     11a0 <main+0x50>
mov    %r15,%rdi
call   1030 <free@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [15 x i8] c"countBits <n>\0A\00"
@.str.1 = [5 x i8] c"%4d \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
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%9 = load i32, i32* %4
%10 = icmp slt i32 %9, 2
br i1 %10, label %11, label %13
11: ; preds = %2
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %3
br label %36
13: ; preds = %2
%14 = load i8**, i8*** %5
%15 = getelementptr inbounds i8*, i8** %14, i64 1
%16 = load i8*, i8** %15
%17 = call i32 @atoi(i8* %16)
%18 = call i32* @countBits(i32 %17, i32* %7)
store i32* %18, i32** %6
store i32 0, i32* %8
br label %19
19: ; preds = %30, %13
%20 = load i32, i32* %8
%21 = load i32, i32* %7
%22 = icmp slt i32 %20, %21
br i1 %22, label %23, label %33
23: ; preds = %19
%24 = load i32*, i32** %6
%25 = load i32, i32* %8
%26 = sext i32 %25 to i64
%27 = getelementptr inbounds i32, i32* %24, i64 %26
%28 = load i32, i32* %27
%29 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %28)
br label %30
30: ; preds = %23
%31 = load i32, i32* %8
%32 = add nsw i32 %31, 1
store i32 %32, i32* %8
br label %19
33: ; preds = %19
%34 = load i32*, i32** %6
%35 = call i32 @free(i32* %34)
br label %36
36: ; preds = %33, %11
%37 = load i32, i32* %3
ret i32 %37
}

LLVM IR (-O2):
@.str.1 = [5 x i8] c"%4d \00"
@str = [14 x i8] c"countBits <n>\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = alloca i32
%4 = icmp slt i32 %0, 2
br i1 %4, label %5, label %7
5: ; preds = %2
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @str, i64 0, i64 0))
br label %26
7: ; preds = %2
%8 = bitcast i32* %3 to i8*
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = tail call i32 @atoi(i8* %10)
%12 = call i32* @countBits(i32 %11, i32* %3)
%13 = load i32, i32* %3
%14 = icmp sgt i32 %13, 0
br i1 %14, label %15, label %24
15: ; preds = %7, %15
%16 = phi i64 [ %20, %15 ], [ 0, %7 ]
%17 = getelementptr inbounds i32, i32* %12, i64 %16
%18 = load i32, i32* %17
%19 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %18)
%20 = add nuw nsw i64 %16, 1
%21 = load i32, i32* %3
%22 = sext i32 %21 to i64
%23 = icmp slt i64 %20, %22
br i1 %23, label %15, label %24
24: ; preds = %15, %7
%25 = call i32 @free(i32* %12)
br label %26
26: ; preds = %24, %5
ret i32 0
}