#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*/ printf(char *);
void print_bits(int ch) {
  for (int mask = 0x80; mask != 0x00; mask >>= 1) {
    if ((ch & mask) != 0) {
      printf("1");
    } else {
      printf("0");
    }
  }
}


x86 assembly (clang, -O0):
<print_bits>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
movl   $0x80,-0x8(%rbp)
cmpl   $0x0,-0x8(%rbp)
je     116b <print_bits+0x5b>
mov    -0x4(%rbp),%eax
and    -0x8(%rbp),%eax
cmp    $0x0,%eax
je     114c <print_bits+0x3c>
lea    0xebe(%rip),%rdi
call   1030 <printf@plt>
jmp    1158 <print_bits+0x48>
lea    0xeaf(%rip),%rdi
call   1030 <printf@plt>
jmp    115d <print_bits+0x4d>
mov    -0x8(%rbp),%eax
sar    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1122 <print_bits+0x12>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_bits>:
push   %rbp
push   %rbx
push   %rax
mov    %edi,%ebx
mov    %edi,%eax
and    $0x80,%eax
cmp    $0x1,%eax
mov    $0x31,%ebp
mov    $0x31,%edi
sbb    $0x0,%edi
call   1030 <putchar@plt>
mov    %ebx,%eax
and    $0x40,%eax
cmp    $0x1,%eax
mov    $0x31,%edi
sbb    $0x0,%edi
call   1030 <putchar@plt>
mov    %ebx,%eax
and    $0x20,%eax
cmp    $0x1,%eax
mov    $0x31,%edi
sbb    $0x0,%edi
call   1030 <putchar@plt>
mov    %ebx,%eax
and    $0x10,%eax
cmp    $0x1,%eax
mov    $0x31,%edi
sbb    $0x0,%edi
call   1030 <putchar@plt>
mov    %ebx,%eax
and    $0x8,%eax
cmp    $0x1,%eax
mov    $0x31,%edi
sbb    $0x0,%edi
call   1030 <putchar@plt>
mov    %ebx,%eax
and    $0x4,%eax
cmp    $0x1,%eax
mov    $0x31,%edi
sbb    $0x0,%edi
call   1030 <putchar@plt>
mov    %ebx,%eax
and    $0x2,%eax
cmp    $0x1,%eax
sbb    $0x0,%ebp
mov    %ebp,%edi
call   1030 <putchar@plt>
and    $0x1,%ebx
or     $0x30,%ebx
mov    %ebx,%edi
add    $0x8,%rsp
pop    %rbx
pop    %rbp
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [2 x i8] c"1\00"
@.str.1 = [2 x i8] c"0\00"
define void @print_bits(i32 %0) {
%2 = alloca i32
%3 = alloca i32
store i32 %0, i32* %2
store i32 128, i32* %3
br label %4
4: ; preds = %17, %1
%5 = load i32, i32* %3
%6 = icmp ne i32 %5, 0
br i1 %6, label %7, label %20
7: ; preds = %4
%8 = load i32, i32* %2
%9 = load i32, i32* %3
%10 = and i32 %8, %9
%11 = icmp ne i32 %10, 0
br i1 %11, label %12, label %14
12: ; preds = %7
%13 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
br label %16
14: ; preds = %7
%15 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
br label %16
16: ; preds = %14, %12
br label %17
17: ; preds = %16
%18 = load i32, i32* %3
%19 = ashr i32 %18, 1
store i32 %19, i32* %3
br label %4
20: ; preds = %4
ret void
}

LLVM IR (-O2):
define void @print_bits(i32 %0) {
%2 = and i32 %0, 128
%3 = icmp eq i32 %2, 0
%4 = select i1 %3, i32 48, i32 49
%5 = tail call i32 @putchar(i32 %4)
%6 = and i32 %0, 64
%7 = icmp eq i32 %6, 0
%8 = select i1 %7, i32 48, i32 49
%9 = tail call i32 @putchar(i32 %8)
%10 = and i32 %0, 32
%11 = icmp eq i32 %10, 0
%12 = select i1 %11, i32 48, i32 49
%13 = tail call i32 @putchar(i32 %12)
%14 = and i32 %0, 16
%15 = icmp eq i32 %14, 0
%16 = select i1 %15, i32 48, i32 49
%17 = tail call i32 @putchar(i32 %16)
%18 = and i32 %0, 8
%19 = icmp eq i32 %18, 0
%20 = select i1 %19, i32 48, i32 49
%21 = tail call i32 @putchar(i32 %20)
%22 = and i32 %0, 4
%23 = icmp eq i32 %22, 0
%24 = select i1 %23, i32 48, i32 49
%25 = tail call i32 @putchar(i32 %24)
%26 = and i32 %0, 2
%27 = icmp eq i32 %26, 0
%28 = select i1 %27, i32 48, i32 49
%29 = tail call i32 @putchar(i32 %28)
%30 = and i32 %0, 1
%31 = or i32 %30, 48
%32 = tail call i32 @putchar(i32 %31)
ret void
}