#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 *, unsigned char);
void printBits(unsigned char c) {
  signed i;
  for (i = 7; i >= 0; i--) {
    printf("%d", (((c) >> (i)) & 1));
  }
}


x86 assembly (clang, -O0):
<printBits>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %dil,%al
mov    %al,-0x1(%rbp)
movl   $0x7,-0x8(%rbp)
cmpl   $0x0,-0x8(%rbp)
jl     1158 <printBits+0x48>
movzbl -0x1(%rbp),%eax
mov    -0x8(%rbp),%ecx
sar    %cl,%eax
and    $0x1,%eax
lea    0xebe(%rip),%rdi
movzbl %al,%esi
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0x8(%rbp)
jmp    1125 <printBits+0x15>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<printBits>:
push   %r14
push   %rbx
push   %rax
mov    %edi,%ebx
mov    %ebx,%eax
shr    $0x7,%al
movzbl %al,%esi
lea    0xedb(%rip),%r14
mov    %r14,%rdi
call   1030 <printf@plt>
mov    %ebx,%eax
shr    $0x6,%al
and    $0x1,%al
movzbl %al,%esi
mov    %r14,%rdi
call   1030 <printf@plt>
mov    %ebx,%eax
shr    $0x5,%al
and    $0x1,%al
movzbl %al,%esi
mov    %r14,%rdi
call   1030 <printf@plt>
mov    %ebx,%eax
shr    $0x4,%al
and    $0x1,%al
movzbl %al,%esi
mov    %r14,%rdi
call   1030 <printf@plt>
mov    %ebx,%eax
shr    $0x3,%al
and    $0x1,%al
movzbl %al,%esi
mov    %r14,%rdi
call   1030 <printf@plt>
mov    %ebx,%eax
shr    $0x2,%al
and    $0x1,%al
movzbl %al,%esi
mov    %r14,%rdi
call   1030 <printf@plt>
mov    %ebx,%eax
shr    %al
and    $0x1,%al
movzbl %al,%esi
mov    %r14,%rdi
call   1030 <printf@plt>
and    $0x1,%ebx
mov    %r14,%rdi
mov    %ebx,%esi
add    $0x8,%rsp
pop    %rbx
pop    %r14
jmp    1030 <printf@plt>

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

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
define void @printBits(i8 zeroext %0) {
%2 = lshr i8 %0, 7
%3 = tail call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8 zeroext %2)
%4 = lshr i8 %0, 6
%5 = and i8 %4, 1
%6 = tail call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8 zeroext %5)
%7 = lshr i8 %0, 5
%8 = and i8 %7, 1
%9 = tail call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8 zeroext %8)
%10 = lshr i8 %0, 4
%11 = and i8 %10, 1
%12 = tail call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8 zeroext %11)
%13 = lshr i8 %0, 3
%14 = and i8 %13, 1
%15 = tail call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8 zeroext %14)
%16 = lshr i8 %0, 2
%17 = and i8 %16, 1
%18 = tail call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8 zeroext %17)
%19 = lshr i8 %0, 1
%20 = and i8 %19, 1
%21 = tail call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8 zeroext %20)
%22 = and i8 %0, 1
%23 = tail call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8 zeroext %22)
ret void
}