#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 *, ...);
int /*<<< orphan*/ putchar(char);
void print_block(char *head, unsigned char block[]) {
  int i;
  printf("%16s : %02X", head ? head : "", block[0]);
  for (i = 1; i < 8; i++)
    printf("-%02X", block[i]);
  putchar('\n');
}


x86 assembly (clang, -O0):
<print_block>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpq   $0x0,-0x8(%rbp)
je     1148 <print_block+0x28>
mov    -0x8(%rbp),%rax
mov    %rax,-0x20(%rbp)
jmp    1158 <print_block+0x38>
lea    0xebc(%rip),%rax
mov    %rax,-0x20(%rbp)
jmp    1158 <print_block+0x38>
mov    -0x20(%rbp),%rsi
mov    -0x10(%rbp),%rax
movzbl (%rax),%edx
lea    0xe96(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x1,-0x14(%rbp)
cmpl   $0x8,-0x14(%rbp)
jge    11aa <print_block+0x8a>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
movzbl (%rax,%rcx,1),%esi
lea    0xe77(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1178 <print_block+0x58>
mov    $0xa,%edi
call   1030 <putchar@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_block>:
push   %r14
push   %rbx
push   %rax
mov    %rsi,%rbx
test   %rdi,%rdi
lea    0xeda(%rip),%rsi
cmovne %rdi,%rsi
movzbl (%rbx),%edx
lea    0xec1(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x1(%rbx),%esi
lea    0xebb(%rip),%r14
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x2(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x3(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x4(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x5(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x6(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x7(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r14
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [12 x i8] c"%16s : %02X\00"
@.str.1 = [1 x i8] zeroinitializer
@.str.2 = [6 x i8] c"-%02X\00"
define void @print_block(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i32
store i8* %0, i8** %3
store i8* %1, i8** %4
%6 = load i8*, i8** %3
%7 = icmp ne i8* %6, null
br i1 %7, label %8, label %10
8: ; preds = %2
%9 = load i8*, i8** %3
br label %11
10: ; preds = %2
br label %11
11: ; preds = %10, %8
%12 = phi i8* [ %9, %8 ], [ getelementptr inbounds ([1 x i8], [1 x i8]* @.str.1, i64 0, i64 0), %10 ]
%13 = load i8*, i8** %4
%14 = getelementptr inbounds i8, i8* %13, i64 0
%15 = load i8, i8* %14
%16 = zext i8 %15 to i32
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0), i8* %12, i32 %16)
store i32 1, i32* %5
br label %18
18: ; preds = %29, %11
%19 = load i32, i32* %5
%20 = icmp slt i32 %19, 8
br i1 %20, label %21, label %32
21: ; preds = %18
%22 = load i8*, i8** %4
%23 = load i32, i32* %5
%24 = sext i32 %23 to i64
%25 = getelementptr inbounds i8, i8* %22, i64 %24
%26 = load i8, i8* %25
%27 = zext i8 %26 to i32
%28 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %27)
br label %29
29: ; preds = %21
%30 = load i32, i32* %5
%31 = add nsw i32 %30, 1
store i32 %31, i32* %5
br label %18
32: ; preds = %18
%33 = call i32 @putchar(i8 signext 10)
ret void
}

LLVM IR (-O2):
@.str = [12 x i8] c"%16s : %02X\00"
@.str.1 = [1 x i8] zeroinitializer
@.str.2 = [6 x i8] c"-%02X\00"
define void @print_block(i8* %0, i8* nocapture %1) {
%3 = icmp eq i8* %0, null
%4 = select i1 %3, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.1, i64 0, i64 0), i8* %0
%5 = load i8, i8* %1
%6 = zext i8 %5 to i32
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0), i8* %4, i32 %6)
%8 = getelementptr inbounds i8, i8* %1, i64 1
%9 = load i8, i8* %8
%10 = zext i8 %9 to i32
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %10)
%12 = getelementptr inbounds i8, i8* %1, i64 2
%13 = load i8, i8* %12
%14 = zext i8 %13 to i32
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %14)
%16 = getelementptr inbounds i8, i8* %1, i64 3
%17 = load i8, i8* %16
%18 = zext i8 %17 to i32
%19 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %18)
%20 = getelementptr inbounds i8, i8* %1, i64 4
%21 = load i8, i8* %20
%22 = zext i8 %21 to i32
%23 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %22)
%24 = getelementptr inbounds i8, i8* %1, i64 5
%25 = load i8, i8* %24
%26 = zext i8 %25 to i32
%27 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %26)
%28 = getelementptr inbounds i8, i8* %1, i64 6
%29 = load i8, i8* %28
%30 = zext i8 %29 to i32
%31 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %30)
%32 = getelementptr inbounds i8, i8* %1, i64 7
%33 = load i8, i8* %32
%34 = zext i8 %33 to i32
%35 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %34)
%36 = tail call i32 @putchar(i8 signext 10)
ret void
}