#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 */
typedef int uint8_t;
typedef int uint16_t;

/* Variables and functions */
int /*<<< orphan*/ printf(char *);
void printByte(uint8_t byteToPrint) {
  uint16_t mask = (0x01 << 7);
  for (int bitIndex = 0; bitIndex < 8; bitIndex++) {
    if (byteToPrint & (mask >> bitIndex)) {
      printf("1");
    } else {
      printf("0");
    }
  }
}


x86 assembly (clang, -O0):
<printByte>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
movl   $0x80,-0x8(%rbp)
movl   $0x0,-0xc(%rbp)
cmpl   $0x8,-0xc(%rbp)
jge    117b <printByte+0x6b>
mov    -0x4(%rbp),%eax
mov    -0x8(%rbp),%edx
mov    -0xc(%rbp),%ecx
sar    %cl,%edx
mov    %edx,%ecx
and    %ecx,%eax
cmp    $0x0,%eax
je     115c <printByte+0x4c>
lea    0xeae(%rip),%rdi
call   1030 <printf@plt>
jmp    1168 <printByte+0x58>
lea    0xe9f(%rip),%rdi
call   1030 <printf@plt>
jmp    116d <printByte+0x5d>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1129 <printByte+0x19>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<printByte>:
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 @printByte(i32 %0) {
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 %0, i32* %2
store i32 128, i32* %3
store i32 0, i32* %4
br label %5
5: ; preds = %20, %1
%6 = load i32, i32* %4
%7 = icmp slt i32 %6, 8
br i1 %7, label %8, label %23
8: ; preds = %5
%9 = load i32, i32* %2
%10 = load i32, i32* %3
%11 = load i32, i32* %4
%12 = ashr i32 %10, %11
%13 = and i32 %9, %12
%14 = icmp ne i32 %13, 0
br i1 %14, label %15, label %17
15: ; preds = %8
%16 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
br label %19
17: ; preds = %8
%18 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
br label %19
19: ; preds = %17, %15
br label %20
20: ; preds = %19
%21 = load i32, i32* %4
%22 = add nsw i32 %21, 1
store i32 %22, i32* %4
br label %5
23: ; preds = %5
ret void
}

LLVM IR (-O2):
define void @printByte(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
}