#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*/ write(int, char *, int);
void print_bits(unsigned char octet) {
  int z;
  z = 128;
  while (z > 0) {
    if (z & octet) {
      write(1, "1", 1);
    } else
      write(1, "0", 1);
    z >>= 1;
  }
}


x86 assembly (clang, -O0):
<print_bits>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %dil,%al
mov    %al,-0x1(%rbp)
movl   $0x80,-0x8(%rbp)
cmpl   $0x0,-0x8(%rbp)
jle    117a <print_bits+0x6a>
mov    -0x8(%rbp),%eax
movzbl -0x1(%rbp),%ecx
and    %ecx,%eax
cmp    $0x0,%eax
je     1159 <print_bits+0x49>
mov    $0x1,%edx
lea    0xeb3(%rip),%rsi
mov    %edx,%edi
call   1030 <write@plt>
jmp    116c <print_bits+0x5c>
mov    $0x1,%edx
lea    0xe9d(%rip),%rsi
mov    %edx,%edi
call   1030 <write@plt>
mov    -0x8(%rbp),%eax
sar    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1125 <print_bits+0x15>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_bits>:
push   %rbp
push   %r14
push   %rbx
movd   %edi,%xmm0
pshufd $0x0,%xmm0,%xmm0
movdqa 0xedb(%rip),%xmm1
pand   %xmm0,%xmm1
pand   0xedf(%rip),%xmm0
pxor   %xmm2,%xmm2
pcmpeqd %xmm2,%xmm0
pcmpeqd %xmm2,%xmm1
packssdw %xmm0,%xmm1
packsswb %xmm1,%xmm1
pmovmskb %xmm1,%ebp
lea    0xed2(%rip),%r14
lea    0xec9(%rip),%rbx
test   $0x80,%bpl
mov    %rbx,%rsi
cmovne %r14,%rsi
mov    $0x1,%edi
mov    $0x1,%edx
call   1030 <write@plt>
test   $0x40,%bpl
mov    %rbx,%rsi
cmovne %r14,%rsi
mov    $0x1,%edi
mov    $0x1,%edx
call   1030 <write@plt>
test   $0x20,%bpl
mov    %rbx,%rsi
cmovne %r14,%rsi
mov    $0x1,%edi
mov    $0x1,%edx
call   1030 <write@plt>
test   $0x10,%bpl
mov    %rbx,%rsi
cmovne %r14,%rsi
mov    $0x1,%edi
mov    $0x1,%edx
call   1030 <write@plt>
test   $0x8,%bpl
mov    %rbx,%rsi
cmovne %r14,%rsi
mov    $0x1,%edi
mov    $0x1,%edx
call   1030 <write@plt>
test   $0x4,%bpl
mov    %rbx,%rsi
cmovne %r14,%rsi
mov    $0x1,%edi
mov    $0x1,%edx
call   1030 <write@plt>
test   $0x2,%bpl
mov    %rbx,%rsi
cmovne %r14,%rsi
mov    $0x1,%edi
mov    $0x1,%edx
call   1030 <write@plt>
test   $0x1,%bpl
cmovne %r14,%rbx
mov    $0x1,%edi
mov    %rbx,%rsi
mov    $0x1,%edx
pop    %rbx
pop    %r14
pop    %rbp
jmp    1030 <write@plt>

LLVM IR (-O0):
@.str = [2 x i8] c"1\00"
@.str.1 = [2 x i8] c"0\00"
define void @print_bits(i8 zeroext %0) {
%2 = alloca i8
%3 = alloca i32
store i8 %0, i8* %2
store i32 128, i32* %3
br label %4
4: ; preds = %17, %1
%5 = load i32, i32* %3
%6 = icmp sgt i32 %5, 0
br i1 %6, label %7, label %20
7: ; preds = %4
%8 = load i32, i32* %3
%9 = load i8, i8* %2
%10 = zext i8 %9 to i32
%11 = and i32 %8, %10
%12 = icmp ne i32 %11, 0
br i1 %12, label %13, label %15
13: ; preds = %7
%14 = call i32 @write(i32 1, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0), i32 1)
br label %17
15: ; preds = %7
%16 = call i32 @write(i32 1, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i32 1)
br label %17
17: ; preds = %15, %13
%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):
@.str = [2 x i8] c"1\00"
@.str.1 = [2 x i8] c"0\00"
define void @print_bits(i8 zeroext %0) {
%2 = zext i8 %0 to i32
%3 = insertelement <8 x i32> poison, i32 %2, i64 0
%4 = shufflevector <8 x i32> %3, <8 x i32> poison, <8 x i32> zeroinitializer
%5 = and <8 x i32> %4, <i32 1, i32 2, i32 4, i32 8, i32 16, i32 32, i32 64, i32 128>
%6 = icmp eq <8 x i32> %5, zeroinitializer
%7 = extractelement <8 x i1> %6, i64 7
%8 = select i1 %7, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0)
%9 = tail call i32 @write(i32 1, i8* %8, i32 1)
%10 = extractelement <8 x i1> %6, i64 6
%11 = select i1 %10, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0)
%12 = tail call i32 @write(i32 1, i8* %11, i32 1)
%13 = extractelement <8 x i1> %6, i64 5
%14 = select i1 %13, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0)
%15 = tail call i32 @write(i32 1, i8* %14, i32 1)
%16 = extractelement <8 x i1> %6, i64 4
%17 = select i1 %16, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0)
%18 = tail call i32 @write(i32 1, i8* %17, i32 1)
%19 = extractelement <8 x i1> %6, i64 3
%20 = select i1 %19, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0)
%21 = tail call i32 @write(i32 1, i8* %20, i32 1)
%22 = extractelement <8 x i1> %6, i64 2
%23 = select i1 %22, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0)
%24 = tail call i32 @write(i32 1, i8* %23, i32 1)
%25 = extractelement <8 x i1> %6, i64 1
%26 = select i1 %25, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0)
%27 = tail call i32 @write(i32 1, i8* %26, i32 1)
%28 = extractelement <8 x i1> %6, i64 0
%29 = select i1 %28, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0)
%30 = tail call i32 @write(i32 1, i8* %29, i32 1)
ret void
}