#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 bits_count(unsigned int);
int /*<<< orphan*/ printf(char *, ...);
int main(void) {
  printf("static int bits_table[] = {\n");
  unsigned i;
  for (i = 0; i < 256; i++) {
    printf("\t%d, // %d\n", bits_count(i), i);
  }
  printf("};\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x8(%rbp)
cmpl   $0x100,-0x8(%rbp)
jae    117a <main+0x5a>
mov    -0x8(%rbp),%edi
call   1040 <bits_count@plt>
mov    %eax,%esi
mov    -0x8(%rbp),%edx
lea    0xeb8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1144 <main+0x24>
lea    0xea8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
lea    0xed2(%rip),%rdi
call   1030 <puts@plt>
lea    0xeba(%rip),%rbx
xor    %ebp,%ebp
nopl   0x0(%rax,%rax,1)
mov    %ebp,%edi
call   1050 <bits_count@plt>
mov    %rbx,%rdi
mov    %eax,%esi
mov    %ebp,%edx
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%ebp
cmp    $0x100,%ebp
jne    1150 <main+0x20>
lea    0xeb1(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [29 x i8] c"static int bits_table[] = {\0A\00"
@.str.1 = [12 x i8] c"\09%d, // %d\0A\00"
@.str.2 = [4 x i8] c"};\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %2
br label %4
4: ; preds = %12, %0
%5 = load i32, i32* %2
%6 = icmp ult i32 %5, 256
br i1 %6, label %7, label %15
7: ; preds = %4
%8 = load i32, i32* %2
%9 = call i32 @bits_count(i32 %8)
%10 = load i32, i32* %2
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32 %9, i32 %10)
br label %12
12: ; preds = %7
%13 = load i32, i32* %2
%14 = add i32 %13, 1
store i32 %14, i32* %2
br label %4
15: ; preds = %4
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [12 x i8] c"\09%d, // %d\0A\00"
@str = [28 x i8] c"static int bits_table[] = {\00"
@str.3 = [3 x i8] c"};\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @str, i64 0, i64 0))
br label %2
2: ; preds = %0, %2
%3 = phi i32 [ 0, %0 ], [ %6, %2 ]
%4 = tail call i32 @bits_count(i32 %3)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32 %4, i32 %3)
%6 = add nuw nsw i32 %3, 1
%7 = icmp eq i32 %6, 256
br i1 %7, label %8, label %2
8: ; preds = %2
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @str.3, i64 0, i64 0))
ret i32 0
}